(log4的三次方+log8的三次方)(log3的2次方-log9的二次方)
问题描述:
(log4的三次方+log8的三次方)(log3的2次方-log9的二次方)
答
=3(log4+log8)*2(log3-log9)
=3(log32)*2(log1/3)
=15(log2)*(-2)(log3)
=-30(log2*log3)