题目内容
函数y=
(x≠0)的最大值为______,此时x的值为______.
| x2 |
| x4+9 |
y=
=
≤
=
,
当且仅当x2=
,即x=±
时取等号.
故答案为:
, ±
| x2 |
| x4+9 |
| 1 | ||
x2+
|
| 1 | ||
2
|
| 1 |
| 6 |
当且仅当x2=
| 9 |
| x2 |
| 3 |
故答案为:
| 1 |
| 6 |
| 3 |
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题目内容
| x2 |
| x4+9 |
| x2 |
| x4+9 |
| 1 | ||
x2+
|
| 1 | ||
2
|
| 1 |
| 6 |
| 9 |
| x2 |
| 3 |
| 1 |
| 6 |
| 3 |