1 |
a+1 |
1 |
b+1 |
1 |
a+1 |
1 |
b+1 |
a+b+2 |
ab+a+b+1 |
a+b+2 |
a+b+2 |
1 |
a+1 |
1 |
b+1 |
1 |
2 |
a |
(a+1)2 |
1 |
(a+1)2 |
A.
| B.
| C.
| D.
|
1 |
x |
1 |
2x |
1 |
3x |
6y2 |
x |
pq |
2r |
2q |
r2 |
1 |
2q |
x2 |
1+x2 |
1 |
1+1 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
3 |
1 |
x |
1 |
2011 |
1 |
2010 |
1 |
2009 |
1 |
2008 |
1 |
2007 |
1 |
3 |
1 |
2 |
x |
3 |
y |
4 |
z |
5 |
x+4y+2z |
8x+y+6z |
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