题目内容
比较大小①
______
②
+
______
(填“>”“=”“<”).
| ||
| 2 |
| 5 |
| 8 |
②
| 3 |
| 5 |
| 8 |
①∵
=
-
,
=
-
,
∵
=
,
=
∴
<
;
②∵(
+
)2=8+2
,(
)2=8,
∴
+
>
.
故填空答案:①<;②>.
| ||
| 2 |
| ||
| 2 |
| 1 |
| 2 |
| 5 |
| 8 |
| 9 |
| 8 |
| 1 |
| 2 |
∵
| ||
| 2 |
| ||
| 8 |
| 9 |
| 8 |
| ||
| 8 |
∴
| ||
| 2 |
| 5 |
| 8 |
②∵(
| 3 |
| 5 |
| 15 |
| 8 |
∴
| 3 |
| 5 |
| 8 |
故填空答案:①<;②>.
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