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Mathematics for IGCSE & O level - Sequences (Section 4 - No. 9)

What is the formula for the nth term of the sequence: 4, 7, 10, 13, ...?
n+3
3n+1
4n
4n-1

Giải thích

The sequence increases by 3 each time and the value is 1 when n = 1.

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