SOLUTION: HOW DO YOU FIND THE DOMAIN AND FUNCTION OF THESE? 1. xy=2 2.y =7 PLEASE EXPLAIN THE PROCESS. ESPECIALLY WHEN YOU FIND THE RANGE. IM REALLY REALLY CONFUSED WITH DOMAIN AND RAN

Algebra ->  Functions -> SOLUTION: HOW DO YOU FIND THE DOMAIN AND FUNCTION OF THESE? 1. xy=2 2.y =7 PLEASE EXPLAIN THE PROCESS. ESPECIALLY WHEN YOU FIND THE RANGE. IM REALLY REALLY CONFUSED WITH DOMAIN AND RAN      Log On


   



Question 890155: HOW DO YOU FIND THE DOMAIN AND FUNCTION OF THESE?
1. xy=2
2.y =7
PLEASE EXPLAIN THE PROCESS. ESPECIALLY WHEN YOU FIND THE RANGE. IM REALLY REALLY CONFUSED WITH DOMAIN AND RANGE

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Domain is all x values such that the function is defined.
1. xy=2
y=2%2Fx
This function is defined for all values except for x=0 since division by zero is not defined. So the domain is
(-infinity,0)U(0,infinity)
So the range is all values that are possible given the domain.
For this function all values are represented except x=0 so the range is the same as the domain.
.
.
.
This function is defined for all x values since it is never undefined.
(-infinity,infinity).
However the range is just one point, y=7.