Question: 1. let f(x)= (e^x + e^-x) / 2 a, find f'(x). don't forget the chain rule b, use your answer from Part (a) to simplify

1. let f(x)= (e^x + e^-x) / 2

a, find f'(x). don't forget the chain rule

b, use your answer from Part (a) to simplify 1+(f'(x))^2. make it perfect square.

C, ............from fart (b) to find the arc length of f(x) on the interval [0,1]. exact value.

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