题目内容
有这样一个问题,
与下列哪些数相乘,结果是有理数?
A.3
,B.2-
,C.
+
,D.
,E.0,F.
,问题的答案是(只填写字母)______.
| 2 |
A.3
| 2 |
| 2 |
| 2 |
| 3 |
| 3 | ||
|
| 18 |
∵
×3
=6,(2-
)×
=2
-2,(
+
)×
=2+
,
×
=3,0×
=0,
×
=
=6,
∴
与3
,
,0,
相乘,结果是有理数.
故答案为:A,D,E,F.
| 2 |
| 2 |
| 2 |
| 2 |
| 2 |
| 2 |
| 3 |
| 2 |
| 6 |
| 3 | ||
|
| 2 |
| 2 |
| 18 |
| 2 |
| 36 |
∴
| 2 |
| 2 |
| 3 | ||
|
| 18 |
故答案为:A,D,E,F.
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