课堂探究例2变式训练2-2答案
解:原式=(x-2/x+2-x/x+2)·(x+2)/(x-1)
=-2/(x+2)·(x+2)/(x-1)
=-2/(x-1)
课堂训练第1~2题答案
B;D
课堂训练第3题答案
(a+2)/a
课堂训练第4题答案
x-1
课堂训练第5题答案
解:(x+1/x2-1+x/x-1)÷x+1/x2-2x+1
=(1/x-1+x/x-1)·(x-1)2/x+1
=x+1/x-1·(x-1)2/ x+1
=x-1,
当x=2时,原式=2-1=1
课后提升选择题答案
1 | 2 | 3 | 4 | 5 |
D | B | A | A | D |