Question

The initial term and common difference are given. What is the 43rd term of the arithmetic sequence?
a1 = -2; d = 4

Answer 1

Ok, so this is the third one of these you've had. lets have you try it on your own this time. If you have questions, feel free to ask, or refer to the previous 2 to see how we solved them.

Answer 2

a43=a1[r^42]?

Answer 3

no, this is for geometric series

Answer 4

ok

Answer 5

Recall you are looking first for a function for each term in the form of:

a(n) = C + dn

Where d is given, and C you can solve for by plugging in a(1) = -2

Answer 6

i am getting 170

Answer 7

Well first what did you get for your function of a(n) ?

Answer 8

I get 166, not 170 so one of us is off by 1.

Answer 9

166