2. What is the largest possible subset of R that can be a domain for the real-valued function f(x) = (x^{3}-x)^{1/2} ?
A. |
B. |
C. |
D. |
E. |
Solution: The answer is C
Since we are dealing with a square root the quantity x^{3} –x must be greater than or equal to 0. But
so the answer is C.