Find a formula for the nth term of the arithmetic sequence: an = {−0.2, 0, 0.2, …}.

Question

a_n = −0.2 + n(0.2)

a_n = −0.2 + n(0.02)

a_n = −0.2 + (n − 1)0.02

a_n = −0.2 + (n − 1)0.2

Answer 1

a_n = −0.2 + (n − 1)0.2