Question

X+1/e× totul derivat

Answer 1

$\Big(x+ \dfrac{1}{e^x}\Big) ' = (x+e^{-x})'= 1 + e^{-x}\cdot (-x)' = 1+e^{-x}\cdot(-1) = 1-e^{-x} \\ \\ \rightarrow pentru (e^{-x})' m-am folosit de formula: (e^{u})' = e^u \cdot u'$

Answer 2

(x+e^(-x))'=x'+(e^(-x))'=1-e^(-x)=1-1/e^x