Question

if the term of first 7 terms of an ap is 119 and that of the first 17 terms is 714 . find the sum of its 24 terms.​

Answer 1

Answer:

Given : If the sum of first 7 terms of an AP is 119 and that of the first 17 terms is 714. To find : The sum of its first n terms? Now, subtracting (1) from (2), we get. Substituting the value d = 4 in equation (2), we get.