1 |
2 |
A.(-6,-3) | B.(-6,3) | C.(6,3) | D.(6,-3) |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
A.(1,-1) | B.(-1,2) | C.(-1,-2) | D.(1,-2) |
4 |
5 |
A.y=x2 | B.y=-x2 | C.y=x2(x>0) | D.y=-x2(x>0) |
A.(0,-2) | B.(1,-24) | C.(0,-48) | D.(2,48) |
1 |
2 |
A.抛物线y=-2x2+3x+1的对称轴是直线x=
| ||
B.抛物线y=x2-2x-3,点A(3,0)不在它的图象上 | ||
C.二次函数y=(x+2)2-2的顶点坐标是(-2,-2) | ||
D.函数y=2x2+4x-3的图象的最低点在(-1,-5) |
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