Answer:
After evaluating the function
by putting x = 7, we get f(7)= 1
Step-by-step explanation:
We need to evaluate the function
and find f(7)
For finding f(7) we will put x = 7 in the given function 
So, putting x= 7 and finding f(7)

So, after evaluating the function
by putting x = 7, we get f(7)= 1