a. Evaluate the difference quotient for the given function. Simplify your answer. f( x ) = - x 3, flath ) - fla ) h b. Find the domain of the function (using interval notion h ( x ) = 1 4X 2 - 6X C . Find the domain of function / using interval notation) f ( x ) = * + 4 x 2- 4 d. Evaluate the difference quotient for the given function . f ( x ) = 1+ 5 x - x2, f (3th ) -f (3) h