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(3a-6b/a+b)-(5a-6b/a-b)-(4a-5b/a+b)-(7a-8b/b-a)
人气:181 ℃ 时间:2020-02-04 05:20:29
解答
化简的
=(3a-6b-4a+5b)/(a+b)-(5a-6b-7a+8b)/(a-b)
=(-a-b)/(a+b)-(-2a+2b)/(a-b)
=-1-(-2)
=1
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