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Growing patterns: find a term
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Learn it In a pattern that adds the same amount each time, term n = first term + (n − 1) × the amount added.
Example: 5, 9, 13, 17, … What is term 20?
- It starts at 5 and adds 4 each time.
- To reach term 20 you add 4 nineteen times.
- $5 + 19 \times 4 = 5 + 76 = 81$.
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