爱上海后花园

An为等比数列,Bn为等差数列.a1=b1>0,a3=b3>0,a3不等于b3那么a5和b5大小关系.

a1a5=2a3a5=2a3a1;b1b5=b3^2b5=b3^2b1;a1=b1gt;0a3=b3gt;0a1a3a5b5=2a3a1b3^2b1=2a3a1a3^2a1=2a3a1a1^2a3^2a1=a1a3^2a1...

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