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Multiple choice

Find the nth term of the given sequence. 6, 9, 14, 21, ...

  1. n2 + 5

  2. n2 + 3n + 5

  3. n2 -3n -5

  4. n2 - 5
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sequence: 6, 9, 14, 21. Differences: 3, 5, 7. This is a quadratic sequence. n=1: 1^2+5=6. n=2: 2^2+5=9. n=3: 3^2+5=14. n=4: 4^2+5=21. The formula n^2+5 works.

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