题目内容
等比数列{an}的各项均为正数,且a5a6+a3a8=16,则log2a1+log2a2+…+log2a10的值为( )
| A.15 | B.-15 | C.3 | D.-3 |
等比数列{an}的各项均为正数,且a5a6+a3a8=16,则 a5a6 =a3a8 =8=a1a10.
∴log2a1+log2a2+…+log2a10=log2(a1a2…a10)=log2(a1a10)5=log2215=15.
故选A.
∴log2a1+log2a2+…+log2a10=log2(a1a2…a10)=log2(a1a10)5=log2215=15.
故选A.
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