If sn the sum of the first n terms of an ap is given by sn=2n^2 n then

Solve this: a p q if in an the sum maths arithmetic of terms ap is same as show first and r are b c respectively prove that equal to formulas ( progression ) how derive formula for n its examples en find buchan musur1997 then firstterms 50 10 210 last 15 ex 5 4 2 (optional) third seventh 6 second 2p m odd even respecti 162 ratio it s 6th boards important question 02 p−q/p 3p−2q/p 5p−3q/p 12 3 11 4n n2 sn given by sn=2n^2