Are my answers correct if not which are right?
Find the second difference for the sequence.
7, 6, 7, 10, 15, 22, ….
1
2
3
5
answer:a
Find first differences for the sequence in order from a1 to a5. Determine whether or not the series is quadratic or not.
-1, -3, -1, 5, 15
2, 2, 6, 10; not quadratic
2, 2, 6, 10; quadratic
-2, 2, 6, 10; not quadratic
-2, 2, 6, 10; quadratic
answer: d
Find a quadratic model for the sequence.
-4, -4, -3, -1, 2
________________________________________
y = 0.5x2 - 0.5x - 4
y = 0.5x2 - 1.5x - 3
y = 4.5x2 - 21.5x+21
y = -4.5x2 + 21.4x - 21
answer: b
1 answer
see your previous post under anonymous
1 answer