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A.函数f(x)的值域为[1,4] | ||
B.关于x的方程f(x)-
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C.当x∈[2n-1,2n](n∈N*)时,函数f(x)的图象与x轴围成的面积为2 | ||
D.存在实数x0,使得不等式x0f(x0)>6成立 |
3 |
2 |
3 |
2 |
x |
2 |
3 |
2 |
1 |
2 |
x |
2 |
x |
22 |
3 |
2 |
x |
2 |
1 |
2 |
x |
2 |
x |
22 |
23-n |
3×2n-2-2n-1 |
1 |
2 |
1 |
2 |
6 |
x |
6 |
3•2n-2 |
6 |
x |
1 |
x |
A.x1+x2>0,y1+y2>0 | B.x1+x2>0,y1+y2<0 |
C.x1+x2<0,y1+y2>0 | D.x1+x2<0,y1+y2<0 |
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|
A.[
| B.[
| C.[
| D.[1,3) |
A.0 | B.1 | C.2 | D.3 |
3 |
4 |
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