Question

The nth term of a sequence is 23-4n. Find the value of n when the nth term is - 65. ​

Answer 1

n = 22

Explanation:

given
`a_(n)` = 23 - 4n and
`a_(n)` = - 65 , then equate right sides and solve for n

23 - 4n = - 65 ( subtract 23 from both sides )

- 4n = - 88 ( divide both sides by - 4 )

n = 22