1﹚f(x)=√[x²-2x-3/log2(x-1)]还是2﹚f(x)=﹙√x²-2x-3﹚/log2(x-1)若是1﹚则x²-2x-3＞0 log2(x-1)＞0或x²-2x-3＜0 log2(x-1)＜0且log2(x-1)≠0∴x＞3或x＜-1 x＞2 或-1＜x＜3 1 ＜ x＜2 且x≠...