930 Example 6.19. If y, is a polynomial for which fifth difference is constant and Y; +375-784, y2 + yo = 686, yg + y = 1088, find ya (Mumbai, B. Tech., 2004) 930 Example 6.19. If y, is a polynomial for which fifth difference is constant and Y; +375-784, y2 + yo = 686, yg + y = 1088, find ya (Mumbai, B. Tech., 2004)