How to get answer by Mimiwhatsup:

Answer:
f=ab/a+b
Step-by-step explanation:
Let's solve for f.
1/f=1/a+1/b
I think your equation is wrong. the domain of f(x)= 5x+2 is ALL REAL NUMBERS. That means it’s negative infinity to positive infinity.
Answer:
I think you forgot part of the question
Step-by-step explanation:


No, since 0 doesn't belong to the domain.