an+1 |
an+4 |
an+2 |
an+3 |
an+1 |
an+4 |
an+2 |
an+3 |
an+d |
an+4d |
an+2d |
an+3d |
(an+d)(an+4d) |
(an+2d)(an+3d) |
an+1 |
an+4 |
an+2 |
an+3 |
1 |
4x |
1 |
4y |
1 |
x+y |
1 |
4 |
1 |
9 |
1 |
4 |
1 |
9 |
(a+b+c)2 |
14 |
3 |
2 |
7 |
n+2 |
n+1 |
n+1 |
n |
b+c-a |
a |
a+c-b |
b |
a+b-c |
c |
3 |
7 |
5 |
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