已知10的a次幂是2,10的b次幂是3,表示log的以5为底的36的对数
人气:250 ℃ 时间:2019-08-21 16:00:39
解答
10^a=2
∴a=lg2
同理
b=lg3
log5 36=2lg6/lg5=2(lg2+lg3)/(1-lg2)=2(a+b)/(1-a)
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