Cho f (x) = x^2 / -x + 1 . Tính f ^ (2018) (x) - 2018! / (-x + 1)^201846/50Cho fx=x2-x+1. Tính f2018x -2018!-x+120182018!-x+12019-2018!-x+120192018!-x+12018Giải thích