Question

Ok Sofia I could get some help on this, it would be awesome :)

Question: Given the arithmetic sequence, 15, 18, 21, 24 write the explicit formula for the sequence

Part B: Find the 56th term.

Answer 1

`a_(n)` = a₁ + d(n - 1)

In the given problem, a₁ = 15 and d = 3

`a_(n)` = 15 + 3(n - 1) = 15 + 3n - 3 = 3n + 12

`a_(56)` = 3(56) + 12 = 168 + 12 = 180

Answer:
`a_(n)` = 3n + 12, 180