- #1

basher87

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## Homework Statement

y = sqrt(exp(x) - exp(-x))

## Homework Equations

dy/dx = dy/du.du/dx - chain rule

d/dx(exp(x)) = exp(x) - derivative of exp(x)

## The Attempt at a Solution

y = sqrt(exp(x) - exp(-x))

y' = (1/2).(1/sqrt(exp(x) - exp(-x))).[exp(x) - (exp(-x).-1)]

y' = [exp(x) + exp(-x)]/[2*sqrt(exp(x) - exp(-x))]

i've tried logarithmic differentation as well coming up with the same answer. derivative calculator says different. please help