|
A.
| B.-
| C.
| D.-
|
|
2 |
3 |
2 |
2 |
2 |
2 |
x |
A.(x-1)2(x≥0) | B.(x+1)2(x≥0) | C.(x-1)2(x≥1) | D.(x+1)2(x≥1) |
1 |
2x |
A.y=-log2(x-2) (x>2) | B.y=-log2(x-2) (x>3) |
C.y=log2(x-2) (x>3) | D.y=-log2x-2 (x>2) |
x-2 |
x |
A.(0,+∞) | B.(0,1) | C.(-∞,0) | D.(-1,0) |
x |
A.y=x2+1(x≥0) | B.y=x2+1(x∈R) | C.y=(x-1)2(x≥1) | D.y=(x-1)2(x∈R) |
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