1 |
2x-1 |
1 |
2 |
1 |
2-x-1 |
1 |
2 |
2x |
1-2x |
1 |
2 |
2x-1+1 |
1-2x |
1 |
2 |
1 |
1-2x |
1 |
2 |
1 |
2x-1 |
1 |
2 |
1 |
2x-1 |
1 |
2 |
1 |
2x-1 |
1 |
2 |
1 |
2 |
1 |
2x-1 |
1 |
2 |
1 |
2x-1 |
1 |
2x-1 |
1 |
2 |
1 |
2x-1 |
1 |
2 |
1 |
2 |
A.(-∞,0] | B.[0,+∞) | C.(-2,0] | D.[0,2) |
π |
6 |
A.f(x)是奇函数且在(-
| ||||
B.f(x)是奇函数且在(-
| ||||
C.f(x)是偶函数且在(0,
| ||||
D.f(x)是偶函数且在(0,
|
A.增函数 |
B.没有单调减区间 |
C.可能存在单调增区间,也可能不存在单调增区间 |
D.没有单调增区间 |
x1+x2 |
2 |
f(x1)+f(x2) |
2 |
1 |
x |
n2+a |
n |
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