lg^32+lg^35+3log2*log5

Aramis882022-10-04 11:39:541条回答

lg^32+lg^35+3log2*log5
求详细过程,谢谢

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朵朵1983 共回答了15个问题 | 采纳率73.3%
lg³2+lg³5+3lg2lg5
=(lg2+lg5)[(lg2+lg5)²-3lg2lg5]+3lg2lg5
=lg10(lg²10-3lg2lg5)+3lg2lg5
=1-3lg2lg5+3lg2lg5
=1.
1年前

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