已知x>1,y>1且1/4 lnx,1/4 lny成等比数列则xy() A有最大值e B有最大值√e C有...已知x>1,y>1且1/4 lnx,1/4 lny成等比数列则xy()A有最大值e B有最大值√e C有最小值e D最小值√e

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