Chapter 2.5, Problem 73E

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8th Edition

James Stewart

ISBN: 9781285740621

Textbook Problem

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Find the given derivative by finding the first few derivatives and observing the pattern that occurs.

To determine

**To find:**

Explanation

**Rule of derivative used:**

**Chain rule: **then

**Given:** y = cos(2x)

**Calculation:**

We have given

Here we see that at fourth derivative, we get original function multiplied by fourth power of 2.

So, here first term is powers of 2 which goes on increasing by 1 at each step and next term will be the one of

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