The sum of 1The Sum of 18th herm a an Aip is 549, given that be common different is 3, find the 56 term and also the Sum ofit 32 herm
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The sum of the first and the 18th terms is 549 ???
a + a+17d = 549
2a + 17d = 549
given: d = 3
2a + 51 = 549
a = 249
"find the 56 terms" ---> find the 56th term ?
term(56) = a + 55d = 249+165 = 414
"the Sum ofit 32 herm" ---> the sum of 32 terms ???
sum(32) = (32)/2)( 2(249) + 32(3) ) = .....