问题描述:
先化简,再求值(1)(3x-3)/(x^2-1)÷3x/(x+1)-1/(x-1),其中x=2
(2)(x^2+2x+1)/(x+2)÷(x^2-1)/(x-1)-1/(x+2),其中x=1/2
(2)(x^2+2x+1)/(x+2)÷(x^2-1)/(x-1)-1/(x+2),其中x=1/2
问题解答:
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