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5.9k views
in Binomial Theorem, Sequences and Series by (49.1k points)

The nth term of the sequence 1, 2, 4, 7, 11, … is

(a) n3 + 3n2 + 2n 

(b) n3 - 3n2 + 3n

(c) n(n + 1)(n + 2)/3

(d) (n2 - n + 2)/2

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1 Answer

+1 vote
by (46.9k points)

(d) (n2 - n + 2)/2

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