Answer:
D
Step-by-step explanation:
This is an arithmetic sequence since there is a common difference between each term. In this case, adding
5
to the previous term in the sequence gives the next term. In other words,
a
.
This is the formula of an arithmetic sequence.
a n = a 1 + d ( n − 1 ) Substitute in the values of a 1 = 4 and d = 5 . a n = 4 + ( 5 ) ( n − 1 ) Simplify each term. Tap for more steps... a n = 4 + 5 n − 5 Subtract 5 from 4 . a n = 5 n − 1
