Posted by Crissy on Wednesday, June 24, 2009 at 10:39pm.
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, Wednesday, June 24, 2009 at 10:54pm
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, Wednesday, June 24, 2009 at 10:57pm
Thank you for the explanation! My teacher really never explained it like you did. Do you teach math?
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