Question

PLEASE HELP ME
What is the 35th term of the arithmetic sequence where a1 = 13 and a17 = -83?

-200
-197
-194
-191

Answer 1

you first need to find the common difference d
then 35th term = a1 + ( 35 - 1)*d

Answer 2

you can find d by calculating (a17 - a1) / x
what do you think x has to be?

Answer 3

i just need the answer, im taking a timed quiz

Answer 4

i dont know how to solve that

Answer 5

you can calculate a17 - a1 = -83 - 13

Answer 6

and x = 17 - 1 = 16 terms

Answer 7

soo? after that

Answer 8

-83 = 13 + 16d

...and..

-96 = 16d
d = -6

So...

a_35 = 34(-6) + 13
= -204 + 13
= -191

Answer 9

HURRRY MY TEST IS ALMOST OVER

Answer 10

OKAY THANK YOU! :) SO MUCH.

Answer 11

ALSO What is the sum of a 17-term arithmetic sequence where the first term is 6 and the last term is -90?