Asked by Anonymous
If the sixth term of an AP is 37.and the sum of the first six terms is 147 find the a)first term. b)sum of the first fifteen terms
Answers
Answered by
oobleck
a+5d = 37
6/2 (2a+5d) = 147
solve for a and d, and then get
S15 = 15/2 (2a+14d)
6/2 (2a+5d) = 147
solve for a and d, and then get
S15 = 15/2 (2a+14d)
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