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Mathematics for IGCSE & O level - Sequences (Section 1 - No. 46)

For the sequence 2, 6, 12, 20, 30, find the formula for the nth term.
n^2+1
n(n+1)
n^2 - 1
n(n+2)

ব্যাখ্যা

The differences between the terms increase by 2. The formula is n(n+1).

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