巳知数列{an}满足a1=5,anan+1=2^n,则a7/a3=,
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巳知数列{an}满足a1=5,anan+1=2^n,则a7/a3=,
已知数列{an}满足a1=5,anan+1=2的n次方,则a7/a3=
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