配套习题- 一元二次不等式中韦达定理的应用 -【青果学院】

1/3单选题

难度：

1.已知关于x的不等式(1-b)

+ax

0的解集为[-1,0],则a+b的值为

A	-2
B	-1
C	1
D	3

正确答案：Qw==

6Kej5p6Q77ya55Sx5omA57uZ6Kej6ZuG5pyJMS1iLWE9MCwg4oi0YStiPTE=

2/3单选题

难度：

2.若a

+bx+c>0的解集为(-2,4),那么对于函数f(x)=a

+bx+c应有

A	f(2)>f(-1)>f(5)
B	f(2)<f(-1)<f(5)
C	f(-1)< f(2) <f(5)
D	f(-1)>f(5) > f(2)

正确答案：QQ==

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

3/3单选题

难度：

3.若关于x的不等式

<1的解集是{x|x<1,或x>2},则实数a的值是

A
B	-
C	1
D	2

正确答案：QQ==

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