2011 Guangdong Question 4 Single-choice Differentiating 2011_省自主命题(广东) 4.函数 $f(x)=\dfrac{1}{1-x}+\lg(1+x)$ 的定义域是 A. $(-\infty,-1)$B. $(1,+\infty)$C. $(-1,1)\cup(1,+\infty)$D. $(-\infty,+\infty)$ Answer keyC ☆ SaveCan't do it, show the explanation查看原卷 →