已知aba+b=6
w*** 2008-10-20 22:56:05 举报
a-b/a+b=6,求:(2a-b/a+b)+(a+b/2a-b) 由a-b/a+b=6 a-b=6a+6b 5a+7b=0 a=-7b/5 带入(2a-b/a+b)+(a+b/2a-b) =(-19b/5)/(-2b/5)+(-2b/5)/(-19b/5) =19/2+2/19=365/38
把a=1+b代如ab=0.5算出a 和b!`就可以了
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