Home » Find the nth term of the sequence 3, 6, 10, 15, 21…..

Find the nth term of the sequence 3, 6, 10, 15, 21…..

Find the nth term of the sequence 3, 6, 10, 15, 21…..
  • A.
    (frac{n(n – 1)}{2})
  • B.
    (frac{n(n + 1)}{2})
  • C.
    (frac{(n + 1)(n + 2)}{2})
  • D.
    n(2n + 1)
Correct Answer: Option C
Explanation

(frac{(n + 1)(n + 2)}{2})
If n = 1, the expression becomes 3
n = 2, the expression becomes 6
n = 4, the expression becomes 15
n = 5, the expression becomes 21

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