已知lg2=0.3010,lg3=0.4771,求lg75的值
人气:194 ℃ 时间:2020-02-04 21:52:22
解答
已知lg2=0.3010,lg3=0.4771,
lg75
=lg3+2lg5
=lg3+2-2lg2
=0.4771+2-3x0.3010
=1.5741
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