1 |
1+x |
1 |
1+4 |
1 |
5 |
1 |
4 |
1 | ||
1+
|
4 |
5 |
1 |
2 |
1 |
2011 |
1 |
2012 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
2 |
2 |
3 |
1 |
4 |
1 |
3 |
1 |
3 |
3 |
4 |
1 |
2 |
1 |
3 |
1 |
n |
1 |
2 |
1 |
2011 |
1 |
2012 |
1 |
2 |
1 |
1×2 |
1 |
2 |
1 |
2×3 |
1 |
2 |
1 |
3 |
1 |
3×4 |
1 |
3 |
1 |
4 |
1 |
n(n+1) |
1 |
1×2 |
1 |
2×3 |
1 |
3×4 |
1 |
2011×2012 |
4 |
x2-4 |
1 |
x+2 |
1 |
2-x |
5x |
x-y |
5y |
y-x |
A |
2x-y |
B |
3x+y |
7x-y |
(2x-y)(3x+y) |
6x2+2x+4 |
x(x-1)(x+2) |
A |
x |
B |
x-1 |
C |
x+2 |
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