A 2,000-kilogram automobile accelerates horizontally to a speed of 20 m/sec. The change in its potential energy is: (Hint: the question did not ask you for the potential energy. It asked you how much the potential energy changed when it increased speed)

answer: he got 23

explanation:

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .