What is the domain of the real-valued function
$$q(x) = \frac{\sqrt{x}}{\sqrt{1-x^2}}~?$$
Express your answer as an interval or as a union of intervals.
1 - x^2 >= 0
-x^2 >= -1
x^2 <= 1
sqrt(x) >= 0 ===> x > 0
Domain: [0, 1)
+501 
+1223 
