What are the first four terms in this sequence represented by the expression n(n-1)-4?
-2,2,6,10
-3,0,3,6
-4,-2,2,8
-5,-4,-2,6
This is for the lesson 13 unit 5 functions unit test for 8th grade
well, just plug in n=1,2,3,4. For example
n=1: 1(1-1)-4 = -4
So choice C is already the only possible one.
To find the first four terms in the sequence represented by the expression n(n-1)-4, we can substitute values of n starting from 1 and calculate the corresponding terms.
Let's do that step-by-step:
When n = 1:
Term = 1(1-1)-4
= 1(0)-4
= 0-4
= -4
When n = 2:
Term = 2(2-1)-4
= 2(1)-4
= 2-4
= -2
When n = 3:
Term = 3(3-1)-4
= 3(2)-4
= 6-4
= 2
When n = 4:
Term = 4(4-1)-4
= 4(3)-4
= 12-4
= 8
Therefore, the first four terms in the sequence represented by the expression n(n-1)-4 are -4, -2, 2, and 8.
Please note that this explanation applies specifically to the expression n(n-1)-4. Other expressions might generate different sequences, so it's important to understand the given expression and follow the steps accordingly.