PreCal
posted by Philip on .
Find the domain of the function.
sqrt of x^29

The domain of a function is the set of all possible input values, which allows the function formula to work.
In this case when x ^2 > 9 then x ^ 2 9 < 0
Square root negative numbers are complex numbers.
So domain of your function :
x ¡ 2 > 9
x > + OR  3
thats mean
x <=  3 and x >= 3
Becouse numbers less of  3:
4,5,6...
numers larger of 3:
4,5,6...
DOMAIN:
x <=  3 and x >= 3
OR
(infinity,3) U (3,infinity)