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Mathematics for IGCSE & O level - Sequences (Section 1 - No. 44)

What are the first three terms of the sequence defined by the rule \(U_n = n^2 - 1\)?
0, 3, 8
1, 4, 9
1, 2, 3
2, 5, 10

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Substitute n = 1, 2, and 3 into the formula.

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