Question

Find f'(x) and f''(x)

Answer 1

\[\LARGE f(x) = 4e^x cos x,\]

Answer 2

for madals or u dnt knw ?

Answer 3

Both, I actually try these mentally as I post them xD

Answer 4

its easy :|
i dnt like easy direct qs

Answer 5

:P

Answer 6

Sorry :3

Answer 7

-.-

Answer 8

ill solve it :|
since i got the medal, hope its correct :3
f'(x)=4e^xcosx-4e^xsinx
f''(x)=4e^xcosx-4e^xsinx-(4e^xcosx+4e^xsinx)=-8e^xsinx

Answer 9

You didn't need to.. but thanks, I forgot to simplify the second time o: