Question

Write an equation for the nth term of the arithmetic sequence.
17, 12, 7, 2, ...
an=

Answer 1

An equation for the nth term of the arithmetic sequence 17, 12, 7, 2 is 17-5n.

Explanation:

Given,

first term(a)=17

common difference (d)=t2-t1

=12-17

=-5

nth term of the arithmetic sequence = a+n×d

=17+n×-5

=17-5n