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Mathematics 23 Online
OpenStudy (anonymous):

What is the sum of a 17–term arithmetic sequence where the first term is 7 and the last term is –105?

jimthompson5910 (jim_thompson5910):

Sum = (n*(first term + last term))/2 where n is the number of terms

OpenStudy (anonymous):

Are u able to do it now @danielamarques ?

OpenStudy (anonymous):

would it be (17(7-105))/2?

jimthompson5910 (jim_thompson5910):

You got it

OpenStudy (anonymous):

so -833?

jimthompson5910 (jim_thompson5910):

bingo

OpenStudy (anonymous):

tank you!

jimthompson5910 (jim_thompson5910):

you're welcome

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