Question

What is the 38th term of the arithmetic sequence of 21, 14, 7,..

Answer 1

Explanation:

First term (a) = 21

common difference (d) = 14-21= -7

general equation for nth term = a+(n-1)d

The 38th term of the AP= 21+(38-1)(-7)

= 21+(37)(-7)

= 21 −259= −238