Answer with Step-by-step explanation:
We are given that 

For each real number 
To prove that f is one -to-one.
Proof:Let  and
 and  be any nonzero real numbers such that
 be any nonzero real numbers such that 

By using the definition of f to rewrite the left hand side of this equation 

Then, by using the definition of f to rewrite the right hand side of this equation  of 

Equating the expression then we get 




Therefore, f is one-to-one.
 
        
             
        
        
        
Answer:
idk when did it end huhuhuhuhuhuhuhuhu
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
Don't know because there is only 1 number there is no another . please write answer in comment