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求极限limx→∞[(3x+4)/(3x-1)]^(x+1)=?
人气:380 ℃ 时间:2019-12-13 04:38:04
解答
[(3x+4)/(3x-1)]^(x+1)=[1+ 5/(3x-1)]^(x+1)= [1+ 5/(3x-1)]^(x-1/3) * [1+ 5/(3x-1)]^(4/3)
= [1+ 5/(3x-1)]^(4/3) * {[1+ 5/(3x-1)]^[(3x-1)/5)]}^(5/3) =e^(5/3)
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