log2 3=a =>log3 2=1/a
log14 56
=log3(56)/log3(14)
=(log3 8+log3 7)/(log3 2+ log3 7)
=(3*1/a+b)/(1/a+b)
=(3+ab)/(1+ab)
3=a,log3 7=b,试用a、b表示log14 56
3=a,log3 7=b,试用a、b表示log14 56
数学人气：873 ℃时间：2020-03-24 03:37:37
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