Question

How do i find the sum of a sequence whose common difference is in arithmetic progression?

Answer 1

Step-by-step explanation:

that is n/2(2a+(n-1)d)

Answer 2

Answer:

Sum=n/2(2a+(n-1)d) a=1st term n=no.of terms d=common difference

or

Sum=n/2(a+l) l=last term

Step-by-step explanation:

this both formulas will help u to get sum of all the terms in a given sequence which are in AP....