Question

Find the derivative of the function.
y = cos [(1 − e^7x)/(1 + e^7x)]

Answer 1

use the chain rule
start with -sin [(1 − e^7x)/(1 + e^7x)]

now u need to find derivative of expression in brackets using quotient rule

Answer 2

imo, simplify \[\frac{ 1-e^{7x} }{ 1+e^{7x} }\]
first, then take the derivative by using rules.

Answer 3

quotient rule

Answer 4

\[y=\cos[(1-e^{7x})*(1+e^{7x})^{-1}]\]

Answer 5

whats next?

Answer 6

quotient rule is the last step

Answer 7

help me