log2的三/log8的九的值是A3/2 B1 C2/3 D2
问题描述:
log2的三/log8的九的值是A3/2 B1 C2/3 D2
答
A
log8 9=log2^3 3^2=(2/3)log2 3
log2 3/log8 9=3/2