Mathematics for IGCSE & O level - Sequences (Section 4 - No. 27) | ExamPlay

Mathematics for IGCSE & O level - Sequences (Section 4 - No. 27)

What is the third term of the sequence defined by the formula n^2 + 2n?

10

12

14

15

설명

Substitute n = 3 into the formula: 3^2 + 2(3) = 15.

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