Question

find the fist derivative to
f(x)=1+2e^-x+xe^-x

Answer 1

\[f(x)=1+2e ^{-x}-xe ^{-x}\]

Answer 2

is it the first one or the second one?

Answer 3

the first

Answer 4

\[f(x) = 1 + 2e^{-x} - xe^{-x}\]
\[f'(x) = -2e^{-x} -e^{-x} + x e^{-x}\]

Answer 5

Ok! The answer is: \[f'(x)=-2e ^{-x}-xe^{-x}+e^{-x}\]

Answer 6

you use the product rule for the -xe^{-x}

Answer 7

also: \[(e^{u})'=u'\times e^{u}\]

Answer 8

@lego_less
check your answer.. it is wrong..

Answer 9

No ur answer is right.