问题
解答题
计算下列各题: (1)(0.25)-2+8
(2)
|
答案
(1)(0.25)-2+8
-(2 3
)-0.75-lg25-2lg2 1 16
=(2-2)-2+(23)
-(2-4)-2 3
-lg100 3 4
=24+22-23-2=16+4-8-2=10.
(2)
=log4 log3 log2512
=log4 log3 log229
=log4 log33
=log41
=0.0