试题:
求值:
(1)lg25+lg2lg50+23+
1
2
log25

(2)
3-2
2
+
3(1-
2
)3
+(
2
-1)0
+(0.027)-
1
3

答案:

我来补答
(1)lg25+lg2lg50+23+
1
2
log25

=lg25+lg2(lg2+lg25)+232log2
5

=lg25+2lg2lg5+lg22+8
5

=(lg2+lg5)2+8
5

=1+8
5

(2)
3-2
2
+
3(1-
2
)3
+(
2
-1)0
+(0.027)-
1
3

=
(
2
-1)2
+
3(1-
2
)3
+1+(0.33)-
1
3

=
2
-1+1-
2
+1+
10
3

=
13
3
 
 
展开全文阅读
剩余:2000
这些题目你会做吗?