a |
x |
3 |
2 |
a |
x |
a |
x1 |
a |
x2 |
(x1x2-a) |
x1x2 |
3 |
2 |
3 |
2 |
1 |
2 |
1 |
2(x+1) |
1 |
2(x+1) |
1 |
2(x+1) |
1 |
2(x+1) |
1 |
2t |
1 |
2t |
19 |
6 |
19 |
6 |
f(2) |
f(1) |
f(4) |
f(3) |
f(2010) |
f(2009) |
f(2012) |
f(2011) |
2 |
2x+1 |
1 |
2 |
1 |
2 |
2x+3 |
x-1 |
A.-
| B.-1 | C.-
| D.-3 |
1 |
2 |
A.(0,+∞) | B.(0.5,8) | C.(0,16] | D.[0,16] |
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