3. What are the first four terms of the sequence represented by the expression n(n − 1) - 4?
A.) -2, 2, 6, 10
B.) -3,0,3,6
C.) -4, -2, 2, 8
D.) -5,-4,-2,6
To find the terms of the sequence represented by the expression n(n − 1) - 4, we simply plug in values of n and simplify.
For n = 1, we have 1(1 − 1) - 4 = -4.
For n = 2, we have 2(2 − 1) - 4 = -2.
For n = 3, we have 3(3 − 1) - 4 = 2.
For n = 4, we have 4(4 − 1) - 4 = 8.
Therefore, the first four terms of the sequence are -4, -2, 2, and 8.
The answer is (C): -4, -2, 2, 8.