题目
已知正数a．b满足4a+b=30，使得
+
| 1 |
| a |
| 1 |
| b |
提问时间：2020-12-25
答案
∵正数a．b满足4a+b=30，
∴
+
=
（4a+b）（
+
）=
(5+
+
)≥
•（5+2
∴
| 1 |
| a |
| 1 |
| b |
| 1 |
| 30 |
| 1 |
| a |
| 1 |
| b |
| 1 |
| 30 |
| b |
| a |
| 4a |
| b |
| 1 |
| 30 |
| 1 |
| a |
| 1 |
| b |
提问时间：2020-12-25
| 1 |
| a |
| 1 |
| b |
| 1 |
| 30 |
| 1 |
| a |
| 1 |
| b |
| 1 |
| 30 |
| b |
| a |
| 4a |
| b |
| 1 |
| 30 |