Question

[Pham Trong Bach]

Cho hàm số $f\left(x\right)=\ln \frac{2018x}{x+1}$ Tính tổng $S=f\text{'}\left(1\right)+f\text{'}\left(2\right)+...+f\text{'}\left(2018\right)$ 

$A. S=\frac{2018}{2019}$

$B. S=1$

$C. S=\ln 2018$

$D. S=2018$

Answer 1

[Cao Minh Tâm]