Question

Find a formula for the nth term

of the arithmetic sequence.
First term -12
Common difference 4
an = 4n + [? ]
I just need the second part please help!

Answer 1

4n - 16.

Explanation:

nth term = a1 + d(n-1)

= -12 + 4(n - 1)

= -12 + 4x + 4*-1

= -12 + 4x - 4

= 4n - 16,