计算题:a+b/5ab.10ab²/a²-b²
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计算题:a+b/5ab.10ab²/a²-b²
计算题:a+b/5ab.10ab²/a²-b²
计算题:a+b/5ab.10ab²/a²-b²
a+b/5ab.10ab²/a²-b²
=a+b/5ab.10ab²/(a+b)(a-b)
=2b/(a-b)
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