JAMB - Mathematics (1989 - No. 4)
If \(12_{e} = X_{7}\), where e = 12, find X.
20
15
14
12
คำอธิบาย
\(12_{12} = 1 \times 12^{1} + 2 \times 12^{0} = 12 + 2 = 14_{10}\)
| 7 | 14 |
| 7 | 2 rm 0 |
| 0 rm 2 |
\(\therefore 12_{e} = 20_{7}\)
\(12_{12} = 1 \times 12^{1} + 2 \times 12^{0} = 12 + 2 = 14_{10}\)
| 7 | 14 |
| 7 | 2 rm 0 |
| 0 rm 2 |
\(\therefore 12_{e} = 20_{7}\)