题目内容
已知
=2.236,那么
=______.
| 5 |
| ||||||||
|
∵
=
=3-
,
∴
=
=
=
,
∵知
=2.236,
∴原式=
=0.4472.
故答案为:0.4472.
14-6
|
32-2×3×
|
| 5 |
∴
| ||||||||
|
| ||||||
|
| ||||
|
| ||
| 5 |
∵知
| 5 |
∴原式=
| 2.236 |
| 5 |
故答案为:0.4472.
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