Answer:
D.
Explanation:
√(x - 6) > 0, because √(x - 6) is in denominator.
√(x - 6) >0
(x - 6)>0
x > 6, so domain is (6, ∞). This is C. or D.
1/√(x - 6) cannot be negative because 1 >0, and √(x - 6) ≥0.
So,range cannot have negative values. And the answer is D.