what are the first four terms of the sequence represented by the expression n(n-1)-4
come on -- just plug in the values for n. You have the formula
an = n(n-1)-4
so,
a1 = 1(1-1)-4 = -4
a2 = 2(2-1)-4 = -2
...
ok i posted the wrong question so .........
To find the terms of the sequence represented by the expression n(n-1)-4, you can substitute different values of n and evaluate the expression. Let's find the first four terms step-by-step:
1. Step: Substitute n = 1 into the expression:
n(n-1)-4 = 1(1-1)-4 = 1(0)-4 = -4
So, the first term of the sequence is -4.
2. Step: Substitute n = 2 into the expression:
n(n-1)-4 = 2(2-1)-4 = 2(1)-4 = 2-4 = -2
The second term of the sequence is -2.
3. Step: Substitute n = 3 into the expression:
n(n-1)-4 = 3(3-1)-4 = 3(2)-4 = 6-4 = 2
The third term of the sequence is 2.
4. Step: Substitute n = 4 into the expression:
n(n-1)-4 = 4(4-1)-4 = 4(3)-4 = 12-4 = 8
The fourth term of the sequence is 8.
Therefore, the first four terms of the sequence represented by the expression n(n-1)-4 are -4, -2, 2, and 8.