A quadratic function f, left bracket, x, right bracket f(x) is hidden from view. You must find all intervals where f, left bracket, x, right bracket f(x) is increasing. Choose the form of the quadratic function f, left bracket, x, right bracket f(x) that you would like to see in order to answer the question most efficiently.
The form of the quadratic function that would be most efficient to answer this question is:
f(x) = ax^2 + bx + c
Where a, b, and c are constants.