19 学选(4分)下列结论错误的是 () .-|||-○A.若 (x)=ln |x-1|, 则 '(x)=dfrac (1)(x-1)-|||-o B. 若 (x)=ln (x+sqrt (1+{x)^2}) 则 '(x)=dfrac (1)(sqrt {1+{x)^2}}-|||-5-|||-○ C.若 (x)=x(x-1)(x-2)... (x-100), 则 '(0)=1001!-|||-D. 若 (x)=(e)^dfrac (1{sqrt {x-1)}}, 则 '(0)=dfrac (e)(2)