3 |
x |
4-x |
3 |
-1 |
x |
1 |
2 |
5 |
2 |
A.①②④ | B.③④ | C.②④ | D.①②③ |
3 |
x |
1 |
3 |
4 |
3 |
1 |
3 |
1 |
x |
1 |
2 |
5 |
2 |
1 |
2 |
1 |
2 |
a+b |
c |
b+c |
a |
c+a |
b |
A.一、二 | B.二、三 | C.三、四 | D.一、四 |
A.图象必经过点(-2,1) | B.图象经过一、二、三象限 | ||
C.当x>
| D.y随x的增大而增大 |
3 |
x |
2 |
x |
1 |
x |
A.y=8x+1 | B.y=8x2 | C.y=8x2+1 | D.y=
|
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