The n^th term of a sequence is n^2-n-2

Find the sum of the first and third terms.
in Other Math Topics by Level 4 User (7.5k points)

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1 Answer

n² - n - 2, When n=1, it's the first term.

1st Term = 1² - 1 - 2 = -2

3rd term (n=3)  = 3² - 3 - 2 = 4

So sum of 1st and 3rd term = -2 + 4 = 2

by Level 2 User (1.7k points)

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