a |
x |
A.(-∞,0) | B.(0,+∞) | C.R | D.[-1,1] |
a |
x |
A.13 | B.-13 | C.7 | D.-7 |
1 |
2 |
A.c<b<a | B.b<c<a | C.c>a>b | D.a<b<c |
f′(x) |
2-x |
A.f(2a)<f(log2a)<f(2) | B.f(log2a)<f(2)<f(2a) |
C.f(2a)<f(2)<f(log2a) | D.f(log2a)<f(2a)<f(2) |
|
A.(0,
| B.[
| C.[
| D.[
|
1 |
5 |
A.(-2,2) | B.(-1,1) | C.(-∞,-1) | D.(-∞,-1),(1,+∞) |
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