Find an explicit formula for the following sequence, an, which starts with a1=-8.

-8,-5,-2,1,4, ...

Formula for an is 3n - 11

Step-by-step explanation:

Step 1: Equation for a (n) = a + (n - 1) d where a = - 8, d = common difference = a2 - a1 = - 5 - - 8 = 3

⇒ a (n) = - 8 + (n - 1) 3 = - 8 + 3n - 3 = 3n - 11

Answer:it's is D