a?2x+a-2 |
2x+1 |
1+x |
k |
n |
n+1 |
a?2x+a-2 |
2x+1 |
-2 |
2x+1 |
-2 |
2x+1 |
-2 |
2-x+1 |
2(2x+1) |
2-x+1 |
-2 |
2x+1 |
-2 |
2x+1 |
2 |
1-y |
1+y |
1-y |
1+y |
1-y |
1+x |
1-x |
1+x |
1-x |
1+x |
k |
-2 |
2n+1 |
n |
n+1 |
2n+2+n×2n+n |
(2n+1)(n+1) |
(2n+1)(n+1)-(3n+2+n×2n) |
(2n+1)(n+1) |
(n×2n+2n+n+1)-(3n+2+n×2n) |
(2n+1)(n+1) |
2n-2n-1 |
(2n+1)(n+1) |