Question

Find the range:
(i) f(x) = 2x2
(ii) f(x) = -x2​

Answer 1

1. The domain of a function is usually all real numbers. The range of f(x)=2^x would be the y values. This would include all values that would be the output for the y value. An example of this would be if you used 2 as x then the function would read f(x)=2^2.
2. The domain of a function is all the values of x for which f(x) yields real values. The values of f(x) when x lies in the domain is the range. The range is all numbers less than 1.

Answer 2

Step-by-step explanation:

$y = 2 {x}^{2}$

$\frac{y}{2} = {x}^{2}$

$\sqrt{ \frac{y}{2} } = {x}$

So, 2 > 0