Answer:
The second band
Step-by-step explanation:
50+20=70
20+25=45
590.4
I believe let me know if it wrong
Answer:
x = 5/7 = 0.714
Step-by-step explanation:
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
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.