Calculus, 10th Edition (Anton)

Published by Wiley
ISBN 10: 0-47064-772-8
ISBN 13: 978-0-47064-772-1

Chapter 2 - The Derivative - 2.7 Implicit Differentiation - Exercises Set 2.7 - Page 166: 25

Answer

The proof is below.

Work Step by Step

Let $ y = x^m$. Thus, $y^{\frac{1}{m}}= x$ Taking the derivative on both sides, we find: $\frac{1}{m}y^{\frac{1-m}{m}}\frac{dy}{dx}= 1$ $\frac{dy}{dx} = my^{\frac{m-1}{m}} = m (x^m)^{\frac{m-1}{m}} = mx^{m-1}$ Thus, we have proven $\frac{d}{dx}(x^m) = mx^{m-1}$ using implicit differentiation.
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