A ray of light passes through a length of curved optical fibre Draw a diagram showing the fibre and the path of the ray of light.

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more

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 .