Question

Differentiation
Given that f(x)=(3x+1)/(x-7) ,find f'(2).
Just to double check my answer @hartnn

Answer 1

ok, what did you get as f'(x) ?

Answer 2

\[f'(x)=\frac{ -22 }{ (x-7)^2 }\]

Answer 3

correct!
and -22/25 is also correct :)

Answer 4

Thank you @hartnn :)
i think the book's answer is wrong or maybe printing error