Ceistean
San diagram gu h-矛osal feumaidh am p脿tran le 1 triantan 3 slatan. Feumaidh am p脿tran le 2 thriantan 5 slatan.
Feuch am freagair thu na ceistean seo a' cleachdadh an diagram gu h-脿rd.
Question
L矛on an cl脿r airson an 脿ireamh shlatan a dh'fheumas tu airson diofar 脿ireamhan thriantan.
| 脌ireamh thriantan (T) | 1 | 2 | 3 | 4 | 5 | 6 |
| 脌ireamh shlatan (S) | 3 | 5 |
| 脌ireamh thriantan (T) |
|---|
| 1 |
| 2 |
| 3 |
| 4 |
| 5 |
| 6 |
| 脌ireamh shlatan (S) |
|---|
| 3 |
| 5 |
Bu ch貌ir gur e seo a bhiodh san dara loidhne dhen chl脿r: 3, 5, 7, 9, 11, 13.
| 脌ireamh thriantan (T) | 1 | 2 | 3 | 4 | 5 | 6 |
| 脌ireamh shlatan (S) | 3 | 5 | 7 | 9 | 11 | 13 |
| 脌ireamh thriantan (T) |
|---|
| 1 |
| 2 |
| 3 |
| 4 |
| 5 |
| 6 |
| 脌ireamh shlatan (S) |
|---|
| 3 |
| 5 |
| 7 |
| 9 |
| 11 |
| 13 |
Question
Sgr矛obh foirmle airson an 脿ireamh shlatan, S, a dh'fheumas sinn ann am p脿tran le T thriantan.
Tha R a' dol suas 2 gach turas. Tha seo a' t貌iseachadh an fhoirmle le \(脪 = 2T\), ach gus an obraich am foirmle seo airson 脿ireamh sam bith de thriantain, feumaidh sinn 1 a chur-ris.
Mar sin 's e am foirmle:
\(S = 2T + 1\)
Question
Cia mheud slat a dh'fheumas sinn airson p脿tran le 12 triantan?
\(脪 = 2 \times 12 + 1 = 25\,slatan\)
Question
Cia mheud triantan a th' ann am p脿tran a tha a' cleachdadh 49 slatan?
\(49 = 2T + 1\)
\(2T = 48\)
\(T = 24\)
Feumaidh sinn 24 triantain.