题目内容
比较大小:
(1)
与0.5;
(2)-
+1与-
.
(1)
| ||
| 2 |
(2)-
| 5 |
| ||
| 2 |
(1)∵0.5=
=
,
>2,
∴
>0.5;
(2)∵-
+1=-(
-1)=-
,2
-2=
(
-1)>
,
∴-
+1<-
.
| 1 |
| 2 |
| 2-1 |
| 2 |
| 5 |
∴
| ||
| 2 |
(2)∵-
| 5 |
| 5 |
2
| ||
| 2 |
| 5 |
| 2 |
| 10 |
| 2 |
∴-
| 5 |
| ||
| 2 |
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