| Write the first five terms of the sequence. an = n2 + 3n |
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Solve |
Step |
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a1 = 12 + 3(1) = 1 + 3 = 4 |
Start with n = 1 |
| a2 = 22 + 3(2) = 4 + 6 = 10 | n = 2 |
| a3 = 32 + 3(3) = 9 + 9 = 18 | n = 3 |
| a4 = 42 + 3(4) = 16 + 12 = 28 | n = 4 |
| a5 = 52 + 3(5) = 25 + 15 = 40 | n = 5 |
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The first five terms are 4, 10, 18, 28, 40 |
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