a2x-1 |
2x+1 |
1+x |
k |
2x-1 |
2x+1 |
2-x-1 |
2-x+1 |
2x-1 |
2x+1 |
1-2x |
1+2x |
2x-1 |
2x+1 |
2 |
2x+1 |
1+y |
1-y |
1+x |
1-x |
1+x |
k |
|
|
A.x2-2x-1 | B.x2+2x-1 | C.x2-6x+7 | D.x2+6x+7 |
1 |
bnbn+1 |
1 |
2x-1 |
A.y=2|x|-1 | B.y=x2,x∈[-1,2] |
C.y=x2+2x | D.y=x3 |
2kx-1 |
kx2+2kx+3 |
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