1 |
2 |
2 |
b |
c |
a-b |
a |
b-c |
b |
c-a |
2 |
3 | -1 |
-1 | ||
-
|
-
| ||
1 |
0 | ||
-1+
|
| ||
2 |
2011a |
a2-2a+1 |
a+1 |
a2-1 |
1 |
2 |
1 |
1×2 |
1 |
1 |
1 |
2 |
1 |
6 |
1 |
2×3 |
1 |
2 |
1 |
3 |
1 |
12 |
1 |
3×4 |
1 |
3 |
1 |
4 |
1 |
20 |
1 |
4×5 |
1 |
4 |
1 |
5 |
1 |
56 |
1 |
72 |
1 |
(a+1)(a+2) |
1 |
(a+2)(a+3) |
1 |
(a+3)(a+4) |
3x |
2y |
9x |
2y |
2y |
9x |
3 |
x+2 |
x2-1 |
x+2 |
x2-1 |
x-1 |
2x |
x3+2x2+x |
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