Asked by Ibinabo
The sum of 18 terms of an A.P is 549. Given that the common difference is 3, find the 56th term and also the sum of the its 32 terms.
Answers
Answered by
oobleck
18/2 (2a+17*3) = 549
so, a = 5
Now just find
a56 = a+55d
S32 = 32/2 (2a+31d)
so, a = 5
Now just find
a56 = a+55d
S32 = 32/2 (2a+31d)
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