2log5^25–3log2^64等于?
问题描述:
2log5^25–3log2^64等于?
答
2log5(25)-3log2(64)
=2log5(5^2)-3log2(2^6)
=2*2log5(5)-3*6log2(2)
=4*1-18*1
=-14
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