1 |
x |
x |
3 |
4 |
3b3+5 |
2-a |
7 |
m |
m2-n2 |
x2+2x+1 |
x2-2x+1 |
A.3个 | B.4个 | C.5个 | D.6个 |
1 |
x |
4 |
3b3+5 |
m |
m2-n2 |
x2+2x+1 |
x2-2x+1 |
2 |
π |
3 |
m |
b |
3 |
c |
a-b |
3 |
4 |
A.2个 | B.3个 | C.4个 | D.5个 |
x-1 |
x2+1 |
x |
3x-5 |
|x|-2008 |
x-2008 |
A.x=2008 | B.x=-2008 | C.x=±2008 | D.x≠2008 |
x+1 |
x-2 |
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