Cho

Câu hỏi: Cho $f\left(x\right)=x\left(x+1\right)\left(x+2\right)\left(x+3\right)\mathrm{...}\left(x+n\right)$ với $n\in N^{*}$. Tính f’(0).

A. $f\text{'}\left(0\right)=n!$

B. $f\text{'}\left(0\right)=n$C. D. $f\text{'}\left(0\right)=\frac{n\left(n+1\right)}{2}$$f\text{'}\left(0\right)=0$

C. $f\text{'}\left(0\right)=0$

D. $f\text{'}\left(0\right)=\frac{n\left(n+1\right)}{2}$