First compute the coefficient like this:

Simplifying the fraction over 4! we get:

and the variables are

. So answer

.
The correct answer is C then.
Answer:

Step-by-step explanation:


![x[2x(x-2)+1(x-2)]](https://tex.z-dn.net/?f=x%5B2x%28x-2%29%2B1%28x-2%29%5D)

X=16/3 or 5.33333 based on the fact that the angles are congruent
(n) stands for natural number. Natural numbers are counting numbers such as 1, 2, 3, 4, 5, 6, 7 etc...
So the first term in the sequence would be:
T(1)=1^2 + 3 = 1 + 3 = 4
Answer:
4