问题描述:
一、
(1)(1/a+1/b)²÷(1/a²-1/b²);
(2) (x/x+y+2y/x+y)·xy/x+2y÷(1/x+1/y);
(3) (a+b/a-b)²·2a-2b/3a+3b-a²/a²-b²÷a/b;
(1)(1/a+1/b)²÷(1/a²-1/b²);
(2) (x/x+y+2y/x+y)·xy/x+2y÷(1/x+1/y);
(3) (a+b/a-b)²·2a-2b/3a+3b-a²/a²-b²÷a/b;
问题解答:
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