Question
find the sum of the arithmetic sequence 52,48,44,...,-12,-16,-20
Answers
bobpursley
find how many terms is it to 20
an=a1+(n-1)d
you know an, a1, and d. Solve for n.
Then find the sum the first n terms.
http://www.regentsprep.org/Regents/math/algtrig/ATP2/ArithSeq.htm
an=a1+(n-1)d
you know an, a1, and d. Solve for n.
Then find the sum the first n terms.
http://www.regentsprep.org/Regents/math/algtrig/ATP2/ArithSeq.htm