
Mark M. answered 05/28/21
Tutor
5.0
(278)
Mathematics Teacher - NCLB Highly Qualified
Sn = (n/2)(2a1 + (n - 1)d))
n = ?
a1 = ?
d = ?
Peter P.
asked 05/28/21Find the sum of arithmetic series 15Σn=3 5n+9 by formula
Mark M. answered 05/28/21
Mathematics Teacher - NCLB Highly Qualified
Sn = (n/2)(2a1 + (n - 1)d))
n = ?
a1 = ?
d = ?
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