Question

What is the common difference of a 43-term arithmetic sequence where the first term is -13 and the sum is 9,374?

Answer 1

\[9374 = {43 \over 2}\left(-13 + n \right) \]Solve for \(n\) to get the last number in this sequence.

Answer 2

use this equation
\(S_n=n/2(2a+(n-1)d)\)
n= 43,a=1st term=-13
Sn=9374

Answer 3

\[d = {a_x - a_y \over x - y} \]

Answer 4

ok what answers did u get? i think i got an asnwer

Answer 5

11 ?

Answer 6

that's what i got too. ok cool thanks for your help

Answer 7

welcome :)