Pretty sure it’s 4/x-1 if u use synthetic division.
Yes ,it is a contact force .Example when a ball touches de floor friction makes it go slow and makes it go up
Answer:
The answer is
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Step-by-step explanation:

To find f(-4) , substitute the value of x that's - 4 into f(x). That is for every x in f(x) , replace it with - 4
We have

We have the final answer as

Hope this helps you