等比数列 Tn=log2a1+log2a2+…+log2an
2个回答
log2 a4的七次方
TN=log2a1+log2a2+…+log2an
T7=log2a1+log2a2+…+log2a7=log2a1a2…a7
等比数列,所以T7=log2 a4的七次方
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