Answer:
C
Step-by-step explanation:
If you simplify the equation you get [tex]\sqrt{\frac{x+3}{1-x} }[/tex]. To solve a square root function, you need to set up[tex]\sqrt{\frac{x+3}{1-x} }\geq 0[/tex]. You can take the square root of both sides to get [tex]\frac{x+3}{1-x} \geq 0[/tex]. Then, we identify the intervals that will satisfy the equation, which is -3 ≤ x < 1.
Sorry if the explanation is kind of confusing, I wasn't sure how to describe it.
