The function f, of, xf(x) is defined below. What is the end behavior of f, of, xf(x)? f, of, x, equals, 108, x, minus, x, to the power 6 , plus, 30, x, to the power 4 , plus, 540, minus, 225, x, squared, minus, 20, x, cubed f(x)=108x−x 6 30x 4 540−225x 2 −20x 3