初二下册数学计算题。
(1)计算:(-a/b)²÷(2a²/5b)²×a/5b;(2)计算:(x²+1)/(x²-1)-(x-2)/(x-1)...
(1)计算:(-a/b)²÷(2a²/5b)²×a/5b;
(2)计算:(x²+1)/(x²-1)-(x-2)/(x-1)÷(x-2)/x.
(3)解方程:2/(x²-4)-1/(x+2)=0. 展开
(2)计算:(x²+1)/(x²-1)-(x-2)/(x-1)÷(x-2)/x.
(3)解方程:2/(x²-4)-1/(x+2)=0. 展开
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