Ask your own question, for FREE!
Mathematics 25 Online
OpenStudy (anonymous):

What is the 23rd term of the arithmetic sequence where a1 = 9 and a5 = 23?

OpenStudy (anonymous):

23rd term = a + 22d where a = first term and d = common difference common difference = (23-9) / 4 = 3.5 23rd term = 9 + 22* 3.5 = 9 + 77 = 86

OpenStudy (anonymous):

follow that ok yasmeen?

OpenStudy (anonymous):

do you see how I calculated the common difference d?

OpenStudy (anonymous):

i think common difference is 7/2. this is becuz, 23=9+d(5-1), 23=9+5d-d, 14=4d, d=7/2. from there, plug it in. so an=9+7/2(23-1), distribute. u get ans=86

OpenStudy (anonymous):

formula for arithmetic explicit is a of n=1st term+common diff(nth term-1)

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Latest Questions
kaelynw: who should I draw (anime characters)
1 minute ago 7 Replies 2 Medals
kaelynw: should I post my art?
1 hour ago 11 Replies 3 Medals
danielfootball123: Question.... How much is questioncove worth if I were to buy it?
5 hours ago 5 Replies 0 Medals
HeyItsAlicia: Mits midnight!!! Happy 16th bday to me !!
2 hours ago 39 Replies 8 Medals
XShawtyX: Art
30 minutes ago 2 Replies 1 Medal
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!