Question

f(x)=3x^3lnx
find f'(e^3)?

Answer 1

\[f(x) = 3x^3 \ln x\]
do you know the value of f' (x)?

Answer 2

its 3x^2(3log(x)+1)

Answer 3

you used product rule here right?

Answer 4

yes

Answer 5

hmm okay..i suggest using ln instead of log though..especially for this problem

so f'(e^3) =\(3(e^3)^2(3\ln (e^3) + 1)\)

Answer 6

im guessing your problem was \(\log (e^3)?\) you didnt use ln?