题目1.设函数 (x)=dfrac (1)(x) ,g(x)=1-x 则 [ g(x)] = ()-|||-① https:/img.zuoyebang.cc/zyb_020a010bfbb910321eb79b6883895189.jpg-dfrac (1)(x) ② https:/img.zuoyebang.cc/zyb_020a010bfbb910321eb79b6883895189.jpg-dfrac (1)(x) ③ dfrac (1)(1-x) ④X题目解答答案