Please help this is my last question so please help with all all

i points) Find the relative extrema of the function f (x) = x + 2x 3. Specifically: The relative maxima of f occur at x =l l The relative minima of f occur at x =[ . The value of f at its relative minimum is' ' otes: Your answer should be a comma separated list of values or the word "none". 1. The relative maxima of f occur at x = 2. The relative minima of f occur at x =1 l 3. The value of f at its relative maximum is l l '\\ 4. The value of f at its relative minimum is' points) Find the relative extreme of the function f (x) = 5x4 - 3x2 + 4. Specifically: The relative maxima of f occur at x = [J The relative minima of f occur at x =' The value of f at its relative maximum isl The values of f at its relative minima are l