Zeros and multiplicity. When a linear factor occurs multiple times in the factorization of a polynomial, that gives the related zero multiplicity. For example, in the polynomial f ( x) = ( x − 1) ( x − 4) 2 , the number 4 is a zero of multiplicity 2 . Notice that when we expand f ( x) , the factor ( x − 4) is written 2 times.Zeros in the quotient (no remainders) Stuck? Review related articles/videos or use a hint. Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere. Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.Now, take 3 tiles and cut them into 3 1.07 by 0.30 sections, use those to span the last column. Then, cut 5 tiles each into two 1.07 by 0.47 sections for the last row. Finally, for the last tile, cut it into one 1.07 by 0.47 section and one 1.07 by 0.30 section. Total tiles used = 99 + 3 + 5 +1 = 108 tiles. •. Basically, If you want to simplify trig equations you want to simplify into the simplest way possible. for example you can use the identities -. cos^2 x + sin^2 x = 1. sin x/cos x = tan x. You want to simplify an equation down so you can use one of the trig …The derivative of a function describes the function's instantaneous rate of change at a certain point. Another common interpretation is that the derivative gives us the slope of the line tangent to the function's graph at that point. Learn how we define the derivative using limits. Learn about a bunch of very useful rules (like the power, product, and quotient rules) that help us find ... There is a rigorous proof, the chain rule is sound. To prove the Chain Rule correctly you need to show that if f (u) is a differentiable function of u and u = g (x) is a differentiable function of x, then the composite y=f (g (x)) is a differentiable function of x. Since a function is differentiable if and only if it has a derivative at each ...Yes, you can express (x^2 - 3)/x^4 as the product (x^2 - 3) * x^-4 and use the product rule to take the derivative. No rule is broken here. Your answer might not appear the same as if you used the quotient rule to differentiate (x^2 - 3)/x^4, but it should end up mathematically equivalent. This is the product rule. Now what we're essentially going to do is reapply the product rule to do what many of your calculus books might call the quotient rule. I have mixed feelings about the quotient rule. If you know it, it might make some operations a little bit faster, but it really comes straight out of the product rule.Or click on the rule number to see the detail of the rule. Latest Version, Rule No. Rule Title, Effective Date. Rule file, 59A-36.001, Standards and Criteria ...Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere. Applying the product rule is the easy part. He then goes on to apply the chain rule a second time to what is inside the parentheses of the original expression. And finally multiplies the result of the first chain rule application to the result of the second chain rule application. Earlier in the class, wasn't there the distinction between ...Multiplying by 1/81 is easier to work out than 1/9 divided by 81. Always remember: dividing by a number is the same as multiplying it by it's inverse. Example: 10/2 is the same a 10*1/2=5. 20/4 is the same as 20*1/4=5. If you want to multiply instead of divide, just take the inverse or reciprocal of the number you want to divide by.This calculus video tutorial explains the concept of implicit differentiation and how to use it to differentiate trig functions using the product rule, quoti...Use the properties of logarithms. Rewrite the following in the form log ( c) . Stuck? Review related articles/videos or use a hint. Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class ...Remember that we're differentiating with respect to 𝑥, which means that the derivative of 𝑦 is 𝑑𝑦∕𝑑𝑥, not 1. So, applying the quotient rule, we get. 𝑑²𝑦∕𝑑𝑥² = (1・𝑦 − 𝑥・𝑑𝑦∕𝑑𝑥)∕𝑦² = 1∕𝑦 − (𝑥∕𝑦²)・𝑑𝑦∕𝑑𝑥. and since 𝑑𝑦∕𝑑𝑥 = 𝑥∕𝑦 ...Suppose we wanted to differentiate x + 3 x 4 but couldn't remember the order of the terms in the quotient rule. We could first separate the numerator and denominator into separate factors, then rewrite the denominator using a negative exponent so we would have no quotients. x + 3 x 4 = x + 3 ⋅ 1 x 4 = x + 3 ⋅ x − 4.And there you have it. It looks intimidating at first, but just say, okay, look. I can use the quotient rule right over here, and then once I apply the quotient rule, I can actually just directly figure out what g of negative one, g prime of negative one, and they gave us f of negative one, f prime of negative one, so hopefully you find that ...Here's a short version. y = uv where u and v are differentiable functions of x. When x changes by an increment Δx, these functions have corresponding changes Δy, Δu, and Δv. y + Δy = (u + Δu) (v + Δv) = uv + uΔv + vΔu + ΔuΔv. Subtract the equation y = uv to get. Δy = uΔv + vΔu + ΔuΔv. The definite integral of a function gives us the area under the curve of that function. Another common interpretation is that the integral of a rate function describes the accumulation of the quantity whose rate is given. We can approximate integrals using Riemann sums, and we define definite integrals using limits of Riemann sums. The fundamental theorem of calculus ties integrals and ...Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere. Integration by parts is a method to find integrals of products: ∫ u ( x) v ′ ( x) d x = u ( x) v ( x) − ∫ u ′ ( x) v ( x) d x. or more compactly: ∫ u d v = u v − ∫ v d u. We can use this method, which can be considered as the "reverse product rule ," by considering one of the two factors as the derivative of another function.You can find further explanations of derivatives on the web using websites like Khan Academy. Below are rules for determining derivatives and links for extra help. Common Derivatives and Rules. Power Rule: \(\frac{d}{dx}x^n=nx^{n-1}\) (Power Rule, Khan Academy) \(\frac{d}{dx} \ln x=\frac{1}{x}\) \(\frac{d}{dx} a^x=a^x\ln a\) \(\frac{d}{dx} e^x ...Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere. the program rules, such as a change in income limit or a program rule. If the MSP eligibility program rules change, your eligibility may change. If your ...There is a rigorous proof, the chain rule is sound. To prove the Chain Rule correctly you need to show that if f (u) is a differentiable function of u and u = g (x) is a differentiable function of x, then the composite y=f (g (x)) is a differentiable function of x. Since a function is differentiable if and only if it has a derivative at each ... We can always use the power rule instead of the quotient rule. However, this isn't possible without another rule called the chain rule, so it's best to stick with the quotient rule until you learn the chain rule. On another note, I believe you may have made a mistake in your use of the quotient rule for your g(x) function. About this unit. The derivative of a function describes the function's instantaneous rate of change at a certain point - it gives us the slope of the line tangent to the function's graph at that point. See how we define the derivative using limits, and learn to find derivatives quickly with the very useful power, product, and quotient rules.Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.Review related articles/videos or use a hint. Report a problem. Do 4 problems. Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.About this unit. In this unit, you'll explore the power and beauty of trigonometric equations and identities, which allow you to express and relate different aspects of triangles, circles, and waves. You'll learn how to use trigonometric functions, their inverses, and various identities to solve and check equations and inequalities, and to ...Proof of the Power Rule... Khan Academy: Video: 7:02: Four. Exponentials and Logarithms. Two more functions that appear repeatedly in any Calculus course and have easy derivatives. ... The quotient rule is as straight-forward as the product rule, but …Why the quotient rule is the same thing as the product rule. Introduction to the derivative of e^x, ln x, sin x, cos x, and tan x If you're seeing this message, it means we're having trouble loading external resources on our website. Why the quotient rule is the same thing as the product rule. Introduction to the derivative of e^x, ln x, sin x, cos x, and tan x If you're seeing this message, it means we're having trouble loading external resources on our website. Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.AP®︎ Calculus AB (2017 edition) 12 units · 160 skills. Unit 1 Limits and continuity. Unit 2 Derivatives introduction. Unit 3 Derivative rules. Unit 4 Advanced derivatives. Unit 5 Existence theorems. Unit 6 Using derivatives to analyze functions. Unit 7 Applications of derivatives. Unit 8 Accumulation and Riemann sums.Joshua Clingman. "When the degree of the numerator of a rational function is less than the degree of the denominator, the x-axis, or y=0, is the horizontal asymptote. When the degree of the numerator of a rational function is greater than the degree of the denominator, there is no horizontal asymptote."1.07.2021 г. ... Pursuant to Rule 65G-10.005(5), Florida Administrative Code, support coordinators may receive in-service training credits by attending ...Basically, If you want to simplify trig equations you want to simplify into the simplest way possible. for example you can use the identities -. cos^2 x + sin^2 x = 1. sin x/cos x = tan x. You want to simplify an equation down so you can use one of the trig …Report a problem. Do 4 problems. Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.Test your understanding of Polynomial expressions, equations, & functions with these % (num)s questions. Start test. This topic covers: - Adding, subtracting, and multiplying polynomial expressions - Factoring polynomial expressions as the product of linear factors - Dividing polynomial expressions - Proving polynomials identities - Solving ...For instance, the differentiation operator is linear. Furthermore, the product rule, the quotient rule, and the chain rule all hold for such complex functions. As an example, consider the function ƒ: C → C defined by ƒ(z) = (1 - 3𝑖)z - 2. It can be shown that ƒ is holomorphic, and that ƒ'(z) = 1 - 3𝑖 for every complex number z.AboutTranscript. To simplify expressions with exponents, there are a few properties that may help. One is that when two numbers with the same base are multiplied, the exponents can be added. Another is that when a number with an exponent is raised to another exponent, the exponents can be multiplied. Created by Sal Khan and CK-12 Foundation.Remember that we're differentiating with respect to 𝑥, which means that the derivative of 𝑦 is 𝑑𝑦∕𝑑𝑥, not 1. So, applying the quotient rule, we get. 𝑑²𝑦∕𝑑𝑥² = (1・𝑦 − 𝑥・𝑑𝑦∕𝑑𝑥)∕𝑦² = 1∕𝑦 − (𝑥∕𝑦²)・𝑑𝑦∕𝑑𝑥. and since 𝑑𝑦∕𝑑𝑥 = 𝑥∕𝑦 ...2^0=1. The reason we get 2^0 is because for every 2^ {n-1}, we are dividing the 2^n by 2, for example to get value of 2^0, we are dividing the 2^1=2 by the 2. The result is therefor 1. But in case of 0, we will be dividing the 0 by the 0. Because 0^1=0 and then we will be diving by our base (which is 0), the result will be 0/0, which is ... For example, the inverse sine of 0 could be 0, or π, or 2π, or any other integer multiplied by π. To solve this problem, we restrict the range of the inverse sine function, from -π/2 to π/2. Within this range, the slope of the tangent is always positive (except at the endpoints, where it is undefined). Therefore, the derivative of the ...In Calculus, the Quotient Rule is a method for determining the derivative (differentiation) of a function in the form of the ratio of two differentiable functions. It is a formal rule used in the differentiation problems in which one function is divided by the other function. The quotient rule follows the definition of the limit of the derivative.Inverse functions, in the most general sense, are functions that "reverse" each other. For example, if f takes a to b , then the inverse, f − 1 , must take b to a . Or in other words, f ( a) = b f − 1 ( b) = a . In this article we will learn how to find the formula of the inverse function when we have the formula of the original function.Or we can rewrite x as e^(ln(x)). Then chain rule gives the derivative of x as e^(ln(x))·(1/x), or x/x, or 1. For your product rule example, yes we could consider x²cos(x) to be a single function, and in fact it would be convenient to do so, since we only know how to apply the product rule to products of two functions. This video introduces key concepts, including the difference between average and instantaneous rates of change, and how derivatives are central to differential calculus. Master various notations used to represent derivatives, such as Leibniz's, Lagrange's, and Newton's notations.For example, x²+y²=1. Implicit differentiation helps us find dy/dx even for relationships like that. This is done using the chain rule, and viewing y as an implicit function of x. For example, according to the chain rule, the derivative of y² would be 2y⋅ (dy/dx). Created by Sal Khan.For instance, the differentiation operator is linear. Furthermore, the product rule, the quotient rule, and the chain rule all hold for such complex functions. As an example, consider the function ƒ: C → C defined by ƒ(z) = (1 - 3𝑖)z - 2. It can be shown that ƒ is holomorphic, and that ƒ'(z) = 1 - 3𝑖 for every complex number z.The power rule will help you with that, and so will the quotient rule. The former states that d/dx x^n = n*x^n-1, and the latter states that when you have a function such as the one you have described, the answer would be the derivative of x^2 multiplied by x^3 + 1, then you subtract x^2 multiplied by the derivative of x^3 - 1, and then divide all that by (x^3 - 1)^2. For instance, the differentiation operator is linear. Furthermore, the product rule, the quotient rule, and the chain rule all hold for such complex functions. As an example, consider the function ƒ: C → C defined by ƒ(z) = (1 - 3𝑖)z - 2. It can be shown that ƒ is holomorphic, and that ƒ'(z) = 1 - 3𝑖 for every complex number z. Remember that we're differentiating with respect to 𝑥, which means that the derivative of 𝑦 is 𝑑𝑦∕𝑑𝑥, not 1. So, applying the quotient rule, we get. 𝑑²𝑦∕𝑑𝑥² = (1・𝑦 − 𝑥・𝑑𝑦∕𝑑𝑥)∕𝑦² = 1∕𝑦 − (𝑥∕𝑦²)・𝑑𝑦∕𝑑𝑥. and since 𝑑𝑦∕𝑑𝑥 = 𝑥∕𝑦 ... Μάθετε δωρεάν μαθηματικά, τέχνη, προγραμματισμό, οικονομικά, φυσική, χημεία, βιολογία, ιατρική, ιστορία, και άλλα. Η Ακαδημία Khan είναι ένας μη κερδοσκοπικός οργανισμός με αποστολή την παροχή δωρεάν, παγκοσμίου ...Using L'Hopital's rule and a couple of steps, we solved something that at least initially didn't look like it was 0/0. We just added the 2 terms, got 0/0, took derivatives of the numerators and the denominators 2 times in a row to eventually get our limit. Up next: video.Matematika, fizika, kimyo, biologiya, iqtisodiyot, tibbiyot va boshqa koʻplab fanlarni bepul oʻrganing. Khan Academy notijorat tashkilot boʻlib, maqsadi dunyo miqyosidagi bepul taʼlim bilan barchani taʼminlash. ... Lesson 10: The quotient rule. Boʻlinmani differensiallash qoidasi. Boʻlinmalarni differensiallang. Ishlangan masala: ...The reaction quotient Q is a measure of the relative amounts of products and reactants present in a reaction at a given time. For reversible reaction aA + bB ⇌ cC + dD , where a , b , c , and d are the stoichiometric coefficients for the balanced reaction, we can calculate Q using the following equation: Q = [ C] c [ D] d [ A] a [ B] b.Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.Class 11 math (India) 15 units · 180 skills. Unit 1 Sets. Unit 2 Relations and functions. Unit 3 Trigonometric functions. Unit 4 Complex numbers. Unit 5 Linear inequalities. Unit 6 Permutations and combinations. Unit 7 Binomial theorem. Unit 8 Sequence and series. Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.The product rule is more straightforward to memorize, but for the quotient rule, it's commonly taught with the sentence "Low de High minus High de Low, over Low Low". "Low" is the function that is being divided by the "High". Additionally, just take some time to play with the formulas and …Video transcript. We have the curve y is equal to e to the x over 2 plus x to the third power. And what we want to do is find the equation of the tangent line to this curve at the point x equals 1. And when x is equal to 1, y is going to be equal to e over 3. It's going to be e over 3.Khan Academy notijorat tashkilot boʻlib, maqsadi dunyo miqyosidagi bepul taʼlim bilan barchani taʼminlash. Matematika, fizika, kimyo, biologiya, iqtisodiyot, tibbiyot va boshqa …The formula for differentiation of product consisting of n factors is. prod ( f (x_i) ) * sigma ( f ' (x_i) / f (x_i) ) where i starts at one and the last term is n. Prod and Sigma are Greek letters, prod multiplies all the n number of functions from 1 to n together, while sigma sum everything up from 1 …Dividing fractions can be understood using number lines and jumps. To divide a fraction like 8/3 by another fraction like 1/3, count the jumps of 1/3 needed to reach 8/3. Alternatively, multiply 8/3 by the reciprocal of the divisor (3/1) to get the same result. This concept applies to other fractions, such as dividing 8/3 by 2/3.Rules for Differentiation - Quotient Rule: (Ch. 3 – p. 122) Chain Rule (Ch. 4 – p. 156) Implicit Differentiation (Ch. 4 – p. 164) ... Second derivatives (video) | Khan Academy Rules for Differentiation - Derivative of a Constant: (Ch. 3 – p. 118) Proof of the constant derivative rule (video) | Khan Academy.ಗಣಿತ, ಕಲೆ, ಕಂಪ್ಯೂಟರ್ ಪ್ರೋಗ್ರಾಮಿಂಗ್, ಅರ್ಥಶಾಸ್ತ್ರ, ಭೌತಶಾಸ್ತ್ರ ...This is the same thing as 2x times x plus x plus 8. 16 divided by 2 is 8, x divided by x is 1. So this is 2x times x plus 8. And then the second two terms right over here-- this is the whole basis of factoring by grouping-- we can factor out a …Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.ICD 10 code for Other abnormal glucose. Get free rules, notes, crosswalks, synonyms, history for ICD-10 code R73.09.Algebra 2 12 units · 113 skills. Unit 1 Polynomial arithmetic. Unit 2 Complex numbers. Unit 3 Polynomial factorization. Unit 4 Polynomial division. Unit 5 Polynomial graphs. Unit 6 Rational exponents and radicals. Unit 7 Exponential models. Unit 8 Logarithms. Differential Calculus 6 units · 117 skills. Unit 1 Limits and continuity. Unit 2 Derivatives: definition and basic rules. Unit 3 Derivatives: chain rule and other advanced topics. Unit 4 Applications of derivatives. Unit 5 Analyzing functions. Unit 6 Parametric equations, polar coordinates, and vector-valued functions. Course challenge.The Khan Academy is an online learning platform that offers free educational resources to students of all ages. With the Khan Academy, you can learn anywhere, anytime. The Khan Academy offers a wide range of subjects for learners of all age...Proof of the Power Rule... Khan Academy: Video: 7:02: Four. Exponentials and Logarithms. Two more functions that appear repeatedly in any Calculus course and have easy derivatives. ... The quotient rule is as straight-forward as the product rule, but …AboutTranscript. Let's dive into the differentiation of the rational function (5-3x)/ (x²+3x) using the Quotient Rule. By identifying the numerator and denominator as separate functions, we apply the Quotient Rule to find the derivative, simplifying the expression for a clear understanding of the process.
For that, we need Mendel's law of segregation. According to the law of segregation, only one of the two gene copies present in an organism is distributed to each gamete (egg or sperm cell) that it makes, and the allocation of the gene copies is random. When an egg and a sperm join in fertilization, they form a new organism, whose genotype .... Kiii weather forecast
About. Transcript. We find the derivatives of tan (x) and cot (x) by rewriting them as quotients of sin (x) and cos (x). Using the quotient rule, we determine that the derivative of tan (x) is sec^2 (x) and the derivative of cot (x) is -csc^2 (x). This process involves applying the Pythagorean identity to simplify final results. The properties of exponents, tell us: 1) To multiply a common base, we add their exponents. 2) To divide a common base, we subtract their exponents. 3) When one exponent is raised to another, we multiply exponents. 4) When multiply factors are in parentheses with an exponent outside, we apply the exponent to all factors inside by multiplying ...2^0=1. The reason we get 2^0 is because for every 2^ {n-1}, we are dividing the 2^n by 2, for example to get value of 2^0, we are dividing the 2^1=2 by the 2. The result is therefor 1. But in case of 0, we will be dividing the 0 by the 0. Because 0^1=0 and then we will be diving by our base (which is 0), the result will be 0/0, which is ...R parallel = 1 ( 1 R1 + 1 R2 + 1 R3) The equivalent parallel resistor is the reciprocal of the sum of reciprocals. We can write this equation another way by rearranging the giant reciprocal, 1 R parallel = 1 R1 + 1 R2 + 1 R3. Ohm's Law applied to parallel resistors, v = i R parallel. From the "viewpoint" of the current source, the equivalent ...Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.As a general rule, where two protected areas overlap, the area with the higher ranking (based on 'IUCN' category and 'TYPE') will be allocated a value of "1 ...Remember that we're differentiating with respect to 𝑥, which means that the derivative of 𝑦 is 𝑑𝑦∕𝑑𝑥, not 1. So, applying the quotient rule, we get. 𝑑²𝑦∕𝑑𝑥² = (1・𝑦 − 𝑥・𝑑𝑦∕𝑑𝑥)∕𝑦² = 1∕𝑦 − (𝑥∕𝑦²)・𝑑𝑦∕𝑑𝑥. and since 𝑑𝑦∕𝑑𝑥 = 𝑥∕𝑦 ...Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/math/ap-calculus-ab/ab-differentiat...Quotient Rule. More Limits Polynomial Approximation of Functions (Part 6) Why the quotient rule is the same thing as the product rule. Introduction to the derivative of e^x, ln x, sin x, cos x, and tan x ...Algebra 2 12 units · 113 skills. Unit 1 Polynomial arithmetic. Unit 2 Complex numbers. Unit 3 Polynomial factorization. Unit 4 Polynomial division. Unit 5 Polynomial graphs. Unit 6 Rational exponents and radicals. Unit 7 Exponential models. Unit 8 Logarithms.2^0=1. The reason we get 2^0 is because for every 2^ {n-1}, we are dividing the 2^n by 2, for example to get value of 2^0, we are dividing the 2^1=2 by the 2. The result is therefor 1. But in case of 0, we will be dividing the 0 by the 0. Because 0^1=0 and then we will be diving by our base (which is 0), the result will be 0/0, which is ...Product rule with tables. Google Classroom. You might need: Calculator. The following table lists the values of functions f and h , and of their derivatives, f ′ and h ′ , for x = 3 . x. . f ( x) . h ( x)The reaction quotient Q is a measure of the relative amounts of products and reactants present in a reaction at a given time. For reversible reaction aA + bB ⇌ cC + dD , where a , b , c , and d are the stoichiometric coefficients for the balanced reaction, we can calculate Q using the following equation: Q = [ C] c [ D] d [ A] a [ B] b.Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere..
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