Question

Find an equation for the nth term of the arithmetic sequence.
-13, -8, -3, 2, ...

Answer 1

An = 5n-18

Explanation:

hello :

note : the n th term of an arithmetic sequence is :

An =A1+(n-1)d ....a common difference is : d and A1 the first term

in this exercice : d = 2-(-3)=-3-(-8) =5 A1 = -13

the n th term of an arithmetic sequence is :An =-13+(n-1)(5)

An = 5n -5 -13

An = 5n-18