配套习题- 二次函数的图像和性质（2） -【青果学院】

1/5单选题

难度：

1.二次函数y=ax²+bx（ab≠0）和y=bx²-ax（ab≠0）的图象可能是（　　）

A
B
C
D

正确答案：QQ==

6Kej77ya5Lik5Ye95pWw55qE5a+556ew6L205YiG5Yir5Li655u057q/eD0tPGltZyB3aWR0aD0xNCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC84Mi8yMS9yQkFDSjFWMDllX0E0dnp6QUFBQmJvbWR0cTg0NjYucG5nIj7lkoznm7Tnur94PS08aW1nIHdpZHRoPTE1IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzgyLzIxL3JCQUNKMVYwOWVfQmdoSm1BQUFCV2hMbmhDZzY0Mi5wbmciPj08aW1nIHdpZHRoPTE0IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0I3L0E0L3JCQUNFMVYwOWUteklTNVhBQUFCWjBlN204bzQ1NS5wbmciPjxicj7iiLVhYuKJoDDvvIw8YnI+4oi05Lik5Ye95pWw5Zu+6LGh55qEIOWvueensOi9tOS4gOato+S4gOi0n++8jDxicj7nurXop4LlkITpgInpobnvvIzlj6rmnIlB6YCJ6aG55Zu+6LGh56ym5ZCI77yOPGJyPuaVhemAiUHvvI4=

2/5单选题

难度：

2.在同一坐标系中，抛物线y=4x²，y=

x²，y=-

x²的共同特点是（　　）

A	关于y轴对称，开口向上
B	关于y轴对称，y随x的增大而增大
C	关于y轴对称，y随x的增大而减小
D	关于y轴对称，顶点是原点

正确答案：RA==

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

3/5单选题

难度：

3.二次函数y=ax²+x+a²-1的图象可能是（　　）

A
B
C
D

正确答案：Qw==

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

4/5单选题

难度：

4.二次函数y=ax²+bx+c的图象如图所示，则下列结论中错误的是（　　）青果学院

A	函数有最小值
B	当-1＜x＜2时，y＞0
C	a+b+c＜0
D	当x＜，y随x的增大而减小

正确答案：Qg==

6Kej77yaQeOAgeeUseWbvuixoeWPr+efpeWHveaVsOacieacgOWwj+WAvO+8jOaVheato+ehru+8mzxicj5C44CB55Sx5oqb54mp57q/5Y+v55+l5b2TLTHvvJx477ycMuaXtu+8jHnvvJww77yM5pWF6ZSZ6K+v77ybPGJyPkPjgIHlvZN4PTHml7bvvIx577ycMO+8jOWNs2ErYitj77ycMO+8jOaVheato+ehru+8mzxicj5E44CB55Sx5Zu+6LGh5Y+v55+l5Zyo5a+556ew6L2055qE5bem5L6neemaj3jnmoTlop7lpKfogIzlh4/lsI/vvIzmlYXmraPnoa7vvI48YnI+5pWF6YCJQu+8jg==

5/5单选题

难度：

5.将二次函数y=x²-2x+3的图象先向左平移1个单位，再向下平移2个单位，平移后得到的图象的函数关系式为（　　）

A	y=（x-1）²
B	y=x²+4
C	y=x²
D	y=（x-1）²+2

正确答案：Qw==

6Kej77ya4oi1eT14PHN1cD4yPC9zdXA+LTJ4KzM977yIeC0x77yJPHN1cD4yPC9zdXA+KzLvvIw8YnI+4oi05bCG5LqM5qyh5Ye95pWweT14PHN1cD4yPC9zdXA+LTJ4KzPnmoTlm77osaHlhYjlkJHlt6blubPnp7sx5Liq5Y2V5L2N77yM5YaN5ZCR5LiL5bmz56e7MuS4quWNleS9je+8jOW+l+WIsOeahOWbvuixoeihqOi+vuW8j+S4ujxicj55Pe+8iHgtMSsx77yJPHN1cD4yPC9zdXA+KzItMu+8jOWNs3k9eDxzdXA+Mjwvc3VwPu+8jjxicj7mlYXpgIlD77yO