Question

Find an equation for the nth term of the arithmetic sequence.

-17, -13, -9, -5, ...

an = -17 + 4(n + 2)

an = -17 x 4(n - 1)

an = -17 + 4(n - 1)

an = -17 + 4(n + 1)

Answer 1

the third one works because if you put 1 in for n, you get -17, and if you put 2 in for n you get - 13. keep doing this and you will see that the correct pattern emerges