A1,a2,a3,...,a40 are the terms of am AP and a1+a5+a15+a26+a36+a40=105 then find a1+a2+a3+....+a40 ?
1 Answer
Aug 1, 2018
Explanation:
Suppose that the common difference of the AP in question is
Given that,
Dividing by
Recall that,