Posted by Crissy on .
Given f(x)= x1/x^225 please determine the domain. Thank you!
A. All real numbers except 5 and 5
B. All real numbers except 5,0 and 5
C. All real numbers except 0
D. All real numbers except 0 and 5

Math 
Reiny,
the only thing you have to worry about in your function is division by zero
When does that happen?
When x^2  25 = 0
or when x^2 = 25
or when x = ± 5
so your domain is any real number, except x = ±5
which would be a) 
Math 
Crissy,
Thank you for the explanation! My teacher really never explained it like you did. Do you teach math?