x0 |
x1 |
x1 |
x2 |
x2 |
x3 |
x0 |
x3 |
x0 |
x1 |
x1 |
x2 |
x2 |
x3 |
x0 |
x3 |
lg1993 |
lgx0-lgx1 |
lg1993 |
lgx1-lgx2 |
lg1993 |
lgx2-lgx3 |
lg1993 |
lgx0-lgx3 |
1 |
a |
1 |
b |
1 |
c |
1 |
a+b+c |
1 |
a |
1 |
b |
1 |
c |
1 |
a |
1 |
b |
1 |
c |
1 | ||
|
a |
1 | ||
|
b |
1 | ||
|
c |
A.f(3)>f(-1) | B.f(3)<f(-1) |
C.f(3)=f(-1) | D.f(3)与f(-1)无法比较 |
A.1 | B.-1 |
C.0 | D.条件不够,不能确定 |
| ||
2 |
x3 |
2 |
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