配套习题- 活用二次根式的“双非负性”解题 -【青果学院】

1/5单选题

难度：

1.

已知a，b为实数，且满足，

则的值为（）

A	-1
B	-2
C	-3
D	-4

正确答案：Qg==

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

2/5单选题

难度：

2.x，y都是实数，且

化简

的值为（）

A	-1
B	-2
C	1
D	2

正确答案：QQ==

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

3/5单选题

难度：

3.若实数a，b，c满足

,则

的值为（）

A
B
C
D

正确答案：QQ==

PGRpdj7op6PvvJrnlLHkuo5jJiM4NzIyOzLiiaUw77yMMiYjODcyMjtj4omlMOino+W+l2M9Mu+8jOaJgOS7pWImIzg3MjI7MmErM++8nTDvvIxhK2ImIzg3MjI7Mu+8nTDop6Plvpc8aW1nIHdpZHRoPTkwIGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzIzLzYwL3JCQUNFMU1NVzFfUkVBNnBBQUFDQ3lUY0ltbzM1OC5wbmciPjwvZGl2PjxkaXY+5omA5Lul77yM5Y6f5byPPTxpbWcgd2lkdGg9MTAxIGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzAwLzcxL3JCQUNGRk1NVzEtd2U2eFdBQUFDV2phaFpGVTkwNy5wbmciPjwvZGl2Pg==

4/5单选题

难度：

4.若

，则a的值为（）

A	4023
B	4024
C	4022
D	4021

正确答案：QQ==

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

5/5单选题

难度：

5.已知

，化简

的值为（）

A
B
C
D

正确答案：Qw==

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