Question

What is the explicit formula for this sequence? 7, 2, -3, -8

Answer 1

Common difference (d) = -5

Explanation:

formula=>

an = a + (n-1)d

=> -8 = 7 + (4-1)d

=> -15 = 3d

=> 3d = -15

=> d = -15/3

=> d = -5