Question

What is the first four sequence an=n2-1

Answer 1

0, 3 , 8 , 15

Explanation:

given the nth term formula

`a_(n)` = n² - 1

to find the first 4 terms, substitute , n = 1, 2, 3, 4 into the formula

a₁ = 1² - 1 = 1 - 1 = 0

a₂ = 2² - 1 = 4 - 1 = 3

a₃ = 3² - 1 = 9 - 1 = 8

a₄ = 4² - 1 = 16 - 1 = 15

The first 4 terms are 0 , 3 , 8 , 15