Asked by Jibrin
the sum of 8th terms of an AP is 549 while the common difference is 3. find the 56th term and the sum of it's 32 terms
Answers
Answered by
oobleck
just plug in your formulas. If you mean
"the sum of the first 8 terms" then
8/2 (2a + 7d) = 549
You have d, so find a, and then
a + 55d
and
32/2 (2a + 31d)
"the sum of the first 8 terms" then
8/2 (2a + 7d) = 549
You have d, so find a, and then
a + 55d
and
32/2 (2a + 31d)
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