配套习题- 巧用实数的性质解题 -【青果学院】

1/5单选题

难度：

1.已知

是实数，

，若

则 a 的值为（）

A
B
C
D

正确答案：RA==

PGRpdj7op6PvvJriiLUgPGltZyB3aWR0aD0xNjQgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMjMvNDMvckJBQ0UxTU1VZkN5cVo4bEFBQURDRXpCVGFRODkzLnBuZyI+PC9kaXY+PGRpdj7iiLQgPGltZyB3aWR0aD0xNDIgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMDAvNTYvckJBQ0ZGTU1VZkRTN2dNY0FBQUM2MFJvNkQwNTU2LnBuZyI+PC9kaXY+PGRpdj7iiLQgPGltZyB3aWR0aD0xMzYgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMjMvNDMvckJBQ0UxTU1VZkR6bHJXY0FBQUNjVkE2RGdnNzYzLnBuZyI+5Y2zPGltZyB3aWR0aD05MyBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8yMy80My9yQkFDRTFNTVVmRERGdW9nQUFBQ0wzRTRPWEk5OTUucG5nIj48L2Rpdj48ZGl2PuS7o+WFpTxpbWcgd2lkdGg9NzcgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMDAvNTYvckJBQ0ZGTU1VZkNUa3dySkFBQUJfMXlSNm1rMzQzLnBuZyI+77yM5YyW566A5b6XPGltZyB3aWR0aD00MSBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8yMy80My9yQkFDRTFNTVVmRENkZ25aQUFBQmhpWUtJNXc0OTUucG5nIj48L2Rpdj4=

2/5单选题

难度：

2.已知实数a、b、c满足

，则

的值为（）

A
B
C
D

正确答案：QQ==

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

3/5单选题

难度：

3.设a是一个无理数，且a、b满足ab-a-b+1=0，则b是一个（　　）

A	小于0的有理数
B	大于0的有理数
C	小于0的无理数
D	大于0的无理数

正确答案：Qg==

PGRpdj7op6PvvJriiLVhYi1hLWIrMT0w77yMPGJyPuKItO+8iGEtMe+8ie+8iGItMe+8iT0w77yMPGJyPuKItWHmmK/ml6DnkIbmlbDvvIw8YnI+4oi0YS0x5LiN5Li6MO+8jDxicj7iiLRiLTE9MO+8jGI9Me+8jDxicj7iiLRi5piv5aSn5LqOMOeahOacieeQhuaVsDwvZGl2Pg==

4/5单选题

难度：

4.已知：实数

满足

，则

的值分别为（）

A	-2，2
B	2，-2
C	1，-2
D	-2，1

正确答案：QQ==

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

5/5单选题

难度：

5.已知a,b是有理数，且

则a，b的值分别为（）

A
B
C
D

正确答案：QQ==

PGRpdj7op6PvvJrlsIblt7Lnn6XnrYnlvI/mlbTnkIbmiJDvvJo8aW1nIHdpZHRoPTM0OCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8wMC81Ni9yQkFDRkZNTVVnRFQxN0tfQUFBR0NHaG5MSjQ1NTMucG5nIj48L2Rpdj48ZGl2PuWboOS4umEsYuaYr+acieeQhuaVsO+8jOaJgOS7pSA8aW1nIHdpZHRoPTMyMCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wMC81Ni9yQkFDRkZNTVVnQ3otQjQxQUFBRXFXUWtQeTQwNzkucG5nIj48L2Rpdj48ZGl2Puino+W+lzxpbWcgd2lkdGg9MTMyIGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzIzLzQzL3JCQUNFMU1NVWdEQW9VLUFBQUFDblZXNnAzYzk1Mi5wbmciPjwvZGl2Pg==