x |
2 |
y |
3 |
1 | |||
|
x |
2 |
y |
3 |
x |
2 |
y |
3 |
1 |
x |
1 | |||
|
1 | |||
|
x | 21 |
1 |
x1 |
x | 22 |
1 |
x2 |
1 |
x1x2 |
1 | |||
|
2 | |||
|
3 | 4 |
1 | |||
|
1 | |||
|
1 |
x1x2 |
3 | 4 |
1 |
x1x2 |
1 |
x1x2 |
1 | |||
|
A.f(a+1)≥f(b+2) | B.f(a+1)>f(b+2) | C.f(a+1)≤f(b+2) | D.f(a+1)<f(b+2) |
A.[2,+∞) | B.[2,4] | C.(-∞,2] | D.[0,2] |
2x-1 |
2x+1 |
n |
n+1 |
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