3/8*log3/8+1/4*log1/4 怎么算

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3/8*log3/8+1/4*log1/4 怎么算

(3/8)log(3/8)+(1/4)log(1/4)
=(3/8)[log3-3log2]+(1/4)[-2log2]
=(3/8)log3 -(13/8)log2