SOLUTION: I need to figure out how to do these and don't understand what steps need to be done. find the domain of the function f(x)= √23-x

Algebra ->  Rational-functions -> SOLUTION: I need to figure out how to do these and don't understand what steps need to be done. find the domain of the function f(x)= √23-x       Log On


   

Question 782841: I need to figure out how to do these and don't understand what steps need to be done.
find the domain of the function
f(x)= √23-x
Answer by fcabanski(1391) About Me  (Show Source):
You can put this solution on YOUR website!
Consider two issues for domain:


1. The denominator isn't 0


2. What's under an even root (usually 2...i.e. square root) isn't negative.


If this is sqrt%2823-x%29 then 23-x >= 0 so -x >= -23 so x <= 23.


The domain is all real numbers such that x<=23.