What is the common difference of a 57-term arithmetic sequence where the first term is -25 and the sum is 17,727?

Question

asnaseer · Answer

do you know the formula for the sum of an arithmetic sequence?

asnaseer · Answer

you can use that to solve this question. look at the details on this site if you need a refresher on the formulas: http://www.mathsisfun.com/algebra/sequences-sums-arithmetic.html

anonymous · Answer

oh thank you! i've been having trouble figuring out the difference between an arithmetic sequence and an arithmetic series, so i get the formulas confused sometimes!

asnaseer · Answer

yw :)

asnaseer · Answer

you may find this useful as well: http://www.regentsprep.org/Regents/math/algtrig/ATP2/ArithSeq.htm