Answer: The value of G(3) is 13.
Step-by-step explanation: We are given a function G(x) defined as :

We are to find the value of G(3).
To find the value of G(3), we must substitute x = 3 in equation (i).
So, substituting x = 3 in equation (i), we get

Thus, the value of G(3) is 13.