19 |
36 |
1 |
2 |
1 |
x |
m+2 |
m |
m-2 |
m+2 |
19 |
36 |
1 |
x |
1 |
x02 |
1 |
x0 |
1 |
x02 |
1 |
2 |
1 |
2 |
x2 |
4 |
1 |
2 |
A.∃x∈R,f(x)>g(x) |
B.有无穷多个x(x∈R),使得f(x)>g(x) |
C.∀x∈R,f(x)>g(x) |
D.{x∈R|f(x)≤g(x)} |
A.充分非必要条件 | B.必要非充分条件 |
C.充要条件 | D.既非充分又非必要条件 |
A.α⊥γ,β⊥γ | B.α∩β=m,n⊥m,n⊂β |
C.m∥α,m⊥β | D.m∥α,m∥β |
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