若log(2a)((1+a^2)/(1+a))
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若log(2a)((1+a^2)/(1+a))
![若log(2a)((1+a^2)/(1+a))](/uploads/image/z/15752381-5-1.jpg?t=%E8%8B%A5log%282a%29%28%281%2Ba%5E2%29%2F%281%2Ba%29%29)
(1)当a>2即a>1/2时
log(2a)((1+a^2)/(1+a))
log(2a)((1+a^2)/(1+a))
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