What is the domain and range of #f(x) = 2x²-3x-1 #?
1 Answer
Aug 26, 2017
See the solution below
Explanation:
Domain is the value of x that it can take, which in this case is infinite.
So it can be written as
let us suppose
Range the values y can take
First we'll find the minimum value of of the function.
Note that the minimum value would be a co-ordinate i.e it will be of the form (x,y) but we'll only take the y value.
This can be found out by the formula
where D is the discriminant.
Therefore
graph{2x^2 - 3x-1 [-10, 10, -5, 5]}
therefore the range of