Question

Identify the domain and range of the function f(x) = 2x2 − 6x − 9.A. D: ℜ R: y ≤ 13.5B. D: ℜ R: y ≥ −13.5C. D: ℜ R: y ≤ −13.5D. D: ℜ R: y ≥ 13.5

Answer 1

given data:

`f(x)=2x^2-6x-9`

to find the range of the given function.

the range of the function is,

`D\colonℜ,R\colon y\ge-13.5`

the answer is option B.