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Mathematics for IGCSE & O level - Sequences (Section 1 - No. 39)
What is the formula for the nth term of the sequence: 1, 8, 15, 22, ...?
7n-6
6n-5
8n-7
n+7
Explication
The difference between terms is 7. Test for the first term, 7*1-6=1
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