A.(﹣1,1]∪(2,+∞) | B.(﹣2,﹣1]∪(1,2] | C.(﹣∞,﹣2)∪(1,2] | D.[﹣2,﹣1] |
A.(0,1) | B.(1,2) | C.(2,3) | D.(3,4) |
A.2个 | B.3个 | C.4个 | D.多于4个 |
A.4 | B.2 | C.-4 | D.与m有关 |
A.f(x1)<0,f(x2)<0 |
B.f(x1)<0,f(x2)>0 |
C.f(x1)>0,f(x2)<0 |
D.f(x1)>0,f(x2)>0 |
A.2 | B.3 | C.4 | D.5 |
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