解方程√2x/x+2 - √1/x+1/2=5/6
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解方程√2x/x+2 - √1/x+1/2=5/6
解方程√2x/x+2 - √1/x+1/2=5/6
解方程√2x/x+2 - √1/x+1/2=5/6
√[2x/(x+2)] - √(1/x+1/2)=5/6
√[2x/(x+2)] - √[(x+2)/2x]=5/6
设√[2x/(x+2)] =A A>>0
原题:
A-1/A=5/6
6A^2-6=5A
6A^2-5A-6=0
(3A+2)(2A-3)=0
3A+2=0 A=-2/3(舍)