Saved Bookmarks
| 1. |
Prove that for 3 le" r " le n, ""^((n-3))C_(r)+.""^((n-3))C_((r-1))+3. ""^((n-3))C_((r-2))+""^((n-3))C_((r-3))=""^(n)C_(r). |
|
Answer» |
|