Question

What is the explicit equation for this series 25,21,17,13

Answer 1

The explicit rule is:

Explanation:

The explicit rule is given by:

`a_n=a_1+d(n-1)`

The given sequence is 25,21,17,13

`a_1=25`

d=21-25

d=-4

We plug in the values into the formula to get;

`a_n=25+-4(n-1)`

`a_n=25-4n+4`

`a_n=29-4n`