Question

What are the first five terms of n squared minus 1?

Answer 1

`a_n=n^2-1\\\\\text{substitute 1, 2, 3, 4, 5}\\\\a_1=1^2-1=1-1=0\\\\a_2=2^2-1=4-1=3\\\\a_3=3^2-1=9-1=8\\\\a_4=4^2-1=16-1=15\\\\a_5=5^2-1=25-1=24\\\\Answer:\ 0,\ 3,\ 8,\ 15,\ 24`