配套习题- “1”的妙用求最值 -【青果学院】

1/5单选题

难度：

1.已知正数

满足

，则

的最小值是（）

A	18
B	16
C	8
D	10

正确答案：QQ==

6Kej77yaPGltZyB3aWR0aD0xODIgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvQUQvNEEvckJBQ0UxTS1pV3pqbzU4V0FBQUR0V0NMN0tvNzIyLnBuZyI+PTEwPGltZyB3aWR0aD02NSBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC84QS9EMC9yQkFDRkZNLWlXNmo3aDBpQUFBQ1BrU1BINW84MTIucG5nIj7vvIzlm6DkuLo8aW1nIHdpZHRoPTE5IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzhBL0QwL3JCQUNGRk0taVdxeEJNbktBQUFCY2kyQUFSczUwOC5wbmciPumDveaYr+ato+aVsO+8jOaJgOS7pTxpbWcgd2lkdGg9NDkgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvOEEvRDAvckJBQ0ZGTS1pVzdRcDJwNEFBQUNHaDVoOVYwNTk2LnBuZyI+6YO95piv5q2j5pWw77yMMTA8aW1nIHdpZHRoPTY5IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0FELzRCL3JCQUNFMU0taVc3UlQtRmpBQUFDT0haeGtuUTExNS5wbmciPjEwKzI8aW1nIHdpZHRoPTgzIGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzhBL0QwL3JCQUNGRk0taVc3aURRM3FBQUFDenpwd0VsQTUyMS5wbmciPizlvZPkuJTku4XlvZM8aW1nIHdpZHRoPTgzIGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0FELzRCL3JCQUNFMU0taVc3ajNvUlhBQUFCOUZrYnR2STA3NS5wbmciPuaXtuetieWPt+aIkOeri+OAgg==

2/5单选题

难度：

2.已知正实数

（）

A	6
B	8
C	9
D	16

正确答案：Qw==

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

3/5单选题

难度：

3.若正数

满足

，则

的最小值是（）

A	2
B	3
C	5
D	6

正确答案：Qw==

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

4/5单选题

难度：

4.设

且

，则

的最小值为（）

A	9
B
C	7
D

正确答案：Qg==

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

5/5单选题

难度：

5.已知

,

等差中项是

,且

,

,则

最小值( )

A	3
B	4
C	5
D	6

正确答案：Qw==

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