Question

Find the 4th term in the following sequence (n = 4)

a1 = 8

an = an-1 - 3

Answer 1

(a , n ) = ( 1, - 4/7 )

Steps:

1- rewrite the expression

2- solve the equation

3- substitute the value of a

4- solve the equation

5- a possible solution is

6- check the solution

7- simplify

8- the ordered pair is a solution