1/a-1/b=(b-a)/ab=5
b-a=5ab
a-b=-5ab
(2a+3ab-2b)/(a-2ab-b)
=[2(a-b)+3ab]/[(a-b)-2ab]
=(-10ab+3ab)/(-5ab-2ab)
=-7ab/(-7ab)
=1
已知1/a-1/b=5,则(2a+3ab-2b)/(a-2ab-b)=?
已知1/a-1/b=5,则(2a+3ab-2b)/(a-2ab-b)=?
数学人气:546 ℃时间:2019-11-17 06:59:08
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