the sum of 11 term of an A.p is 891 find the 28 and 45 terms if the common difference is 15
2 answers
the sum of 11 term of an A.p is 891 find the 28 and 45 terms if the common difference is 15
Yeah -- we got it the first time
11/2 (2a+10*15) = 891
a = 6
a28 = a + 27d
a45 = a + 44d
So just plug and chug
11/2 (2a+10*15) = 891
a = 6
a28 = a + 27d
a45 = a + 44d
So just plug and chug