# Calculus

Find the derivative of

y = (e^x-e^-x)/2

1. (1/2)(e^x + e^x)
= e^x

posted by Damon
2. I think Damon missed that negative sign

This is a catenary and its derivative is

y' = (1/2) (e^x - e^-x)

posted by Reiny

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