Mathematics for IGCSE & O level - Sequences (Section 1 - No. 49) | ExamPlay

Mathematics for IGCSE & O level - Sequences (Section 1 - No. 49)

What is the 4th term of the sequence \(T_n = n^2 + n\)?

16

18

20

24

解释

Substitute n=4 into the formula: 4^2 + 4 = 20

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