Will give brainliest and five stars #3 find an equation for the nth term of the arithmetic sequence. a14 = -33, a15 = 9 answer choices a: an = -579 + 42(n + 1) b: an = -579 + 42(n - 1) c: an = -579 - 42(n + 1) d: an = -579 - 42(n - 1)

Let's see if we can't be logical herePick a formula and see what it yields. For example, choose D.

For n = 1 ---> -1 x 4^1 > -1 x 4 = -4, when the correct value is 1. Therefore D is out.

Try C. For n = 1 ---> 1 x 4^(1-1) ---> 1 x 4^0 > 1 x1 ---> 1, So it is correct for n =1. How about
n=2? 1 x 4^(2-1) = 1 x 4^1 = 1 x 4 = 4, when the correct answer is -4. Therefore C is out

I'm sure you can do the remaining two choices