Find a formula for the nth term of the arithmetic sequence: an = {8.9, 10.3, 11.7, …}

Question

4}an = 8.9 − 10.3n

1}a_n = 1.4 + (n − 1)8.9

2}a_n = 8.9 + (n − 1)1.4

3}a_n = −7.5 − (n + 1)1.4

Answer 1

d = 1.4

a_n = 8.9 + (n - 1)1.4