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Mathematics for IGCSE & O level - Sequences (Section 4 - No. 35)

The formula for the nth term of a sequence is \(2n^2 + 1\). What is the second term of this sequence?
4
7
9
11

Vysvetlenie

Substitute n = 2 into the formula: 2(2)^2 + 1 = 9.

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