A.a=1,b=1 | B.a=-1,b=1 |
C.a=1,b=-1 | D.a=-1,b=-1 |
A.f′(x)>0,g′(x)>0 | B.f′(x)>0,g′(x)<0 |
C.f′(x)<0,g′(x)>0 | D.f′(x)<0,g′(x)<0 |
A.(-1,1) | B. | C. | D. |
A.1 | B. | C. | D. |
A.y=2x+1 ........................ | B.y=2x-1 |
C.y=-2x-3 .................. | D.y=-2x-2 |
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