Engineering Board Exam Reviewer · Derivatives of Inverse Trigonometric Functions · easy

Find y' if y= (2x).

1. 14 x2 + 1
2. 22 x2 + 1
3. 2 1 - 4 x2
4. 24 x2 + 1

Answer

D. 24 x2 + 1

Solution

d/dx u=u'/1+u2. With u=2x: y'=2/1+4x2.

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