Answer:
Step-by-step explanation:
We have to choose the function from the given options which have a range (-∞, a] and a domain [b,∞) where a < 0 and b < 0.
I think the function is ......... (1)
Here, x - b must be greater than equal to zero for the function to be real.
Hence, x - b ≥ 0
⇒ x ≥ b
So, the domain is [b, ∞).
Now, putting x = b in the equation (1),we get f(x) = a and putting x = ∞, we get f(x) = - ∞.
Therefore, the range of the function is (-∞, a]. (Answer)