Question

Evaluate f'(2) if f(x)=...

Answer 1

\[\tan^{-1} (\frac{ 1 }{ x })\]

Answer 2

I got \[-\frac{ 1 }{ 5 }\]

Answer 3

good

Answer 4

:D Thanks.

Answer 5

I think that right because f'x = -1/(x^2 +1) =>> -1/ (2^2) + 1 = -1/5