1.求值25^log(5)^3+lg100+log(1/2)4.
问题描述：
1.求值25^log(5)^3+lg100+log(1/2)4.
2.9^log(3)^5的值为（ ）.
A.5 B.15 C.25 D.45
3.计算log(2)2+log(5)1-log(1/3)1/27+[3^log(3)5]^2+3^log(3)2.
答
1.9
2.25
3.25