Cho hàm số f(x) = x^2/(-x+1). Tính f^(30) (x): 30!(1-x)^-30

A. $f^{\left(30\right)}\left(x\right)=30!{\left(1-x\right)}^{-30}.$

B. $f^{\left(30\right)}\left(x\right)=30!{\left(1-x\right)}^{-31}.$

C. $f^{\left(30\right)}\left(x\right)=-30!{\left(1-x\right)}^{-30}.$

D. $f^{\left(30\right)}\left(x\right)=-30!{\left(1-x\right)}^{-31}.$