If the zeros of polynomial x3 - 3px2 + qx –r are in AP., then(i) 2p3 = pq –r (ii) 2p3= pq + r

If the zeros of polynomial x3 - 3px2 + qx –r are in AP., then
(i) 2p3 = pq –r (ii) 2p3= pq + r (iii) p3 = pq – r (iv) None