Answer
P45 = 3,015
↓Steps Explained:↓
Calculate pentagonal number 45
Pentagonal Number Formula
| Pn = | n(3n - 1) |
| 2 |
Given n = 45, we have:
| P45 = | 45(3(45) - 1) |
| 2 |
| P45 = | 45(135 - 1) |
| 2 |
| P45 = | 45(134) |
| 2 |
| P45 = | 6030 |
| 2 |
P45 = 3,015
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