Question

Find an equation for the nth term of the arithmetic sequence.

a14 = -33, a15 = 9
@agent0smith

Answer 1

If the 14th term is -33, and the 15th term is 9, the common difference must be 33+9 so 42.

use \[\Large a_n = a_1 + d(n-1)\]and a15=9 so:
\[\Large 9 = a_1 + 42(15-1)\]solve for a1

Answer 2

an = -579 + 42(n - 1)
@agent0smith

Answer 3

Yep

Answer 4

YAY

Answer 5

:D