
Mark M. answered 06/05/21
Mathematics Teacher - NCLB Highly Qualified
a2 = a1 + d
a2 - d = a1
18 - d = a1
S10 = (10/2)(2(a1 + 9d)
600 = 5(36 - 2d + 9d)
Can you solve for d and answer?
Adam M.
anyway thank you06/05/21
Adam M.
asked 06/05/21The second term for an arithmetic sequence is 18 while the sum of the first ten terms is 600.
a.Obtain the first term and the common difference.
b.Deduce the sum of the first 15 terms of the sequence.
Mark M. answered 06/05/21
Mathematics Teacher - NCLB Highly Qualified
a2 = a1 + d
a2 - d = a1
18 - d = a1
S10 = (10/2)(2(a1 + 9d)
600 = 5(36 - 2d + 9d)
Can you solve for d and answer?
Adam M.
anyway thank you06/05/21
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Adam M.
i cant solve for question b06/05/21