y=2x-1/x+1怎样移项成y=2-(3/x+1)?
1个回答
(2x-1)/(x+1)
=[(2x+2)-3]/(x+1)
=[2(x+1)-3]/(x+1)
=[2(x+1)/(x+1)]-[3/(x+1)]
=2-[3/(x+1)]
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