0580/13 May/Jun 2021, Question 17: The nth Term of a Linear Sequence
Cambridge IGCSE Mathematics 0580 · Paper 13 (Core) · Calculator · 2 marks
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The question, in short
Given the sequence 7, 11, 15, 19, work out an expression in terms of n that generates each term.
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Solution · 2 marks
- 1The terms go up by 4, so start with 4n
- 24 × 1 = 4 and 7 − 4 = 3
- 3nth term = 4n + 3
Answer4n + 3
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