Question: Assuming that ex is differentiable on R, prove that is differentiable on [0, ). Is f differentiable at 0? f(x) ={1+el/x * #0 tel/x

Assuming that ex is differentiable on R, prove that
f(x) ={1+el/x * #0 tel/x

is differentiable on [0, ˆž). Is f differentiable at 0?

f(x) ={1+el/x * #0 tel/x

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