1 |
x |
A.有极大值2,极小值-2 |
B.有极大值1,极小值-1 |
C.无极大值,但有极小值-2 |
D.有极大值2,无极小值 |
1 |
x2 |
x2-1 |
x2 |
1 |
x2 |
x2-1 |
x2 |
A.-2 | B.0 | C.1 | D.-1 |
1 |
x |
x |
7 |
4 |
A.5x+16y+8=0 | B.5x-16y+8=0 | C.5x+16y-8=0 | D.5x-16y-8=0 |
1 |
3 |
A.3x-y-1=0 | B.3x-y-3=0 |
C.3x-y-1=0或3x-y+3=0 | D.3x-y-1=0或3x-y-3=0 |
A.y=2x-1 | B.y=x | C.y=3x-2 | D.y=-2x+3 |
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