Question

PLEASE HELP!!!

What is the 41st term of the arithmetic sequence where a1 = 17 and a15 = -39 ?

Answer 1

a) -147
b) -143
c) -139
d) -135

Answer 2

# of places between the first and last divided by the distance between the first and last values. Then multiply by the # of places to the place value that you are looking for.

Answer 3

a15 - a1 = 14d ....-17 - 39 = -56....14d = -56, d = -4

an = a1 + (n - 1)d
a41 = 17 + (41 - 1) * -4
a41 = 17 + 40 * -4
a41 = 17 -160
a41 = -143

I think :)

Answer 4

thanks!

Answer 5

YW :)