889 859 834 814
Take successive differences
-30, -25, -20
Continue successive differences using the pattern:
-30, -25, -20, -15, -10, -5, 0, 5, 10, 15, 20
Adding the successive differences:
889, 859, 834, 814, 799, 789, 784, 784, 789, 799, 814
Since the differences are constants, its a quadratic
form
Edwin
