1. f(x)=(x-4)^（2/3）

2. f(x)= (x² - 1)/x³

3. f(x)= ( x³ - x² - 1)/(x - 1)

sketch a graph of the function and find

domain

x-intercepts

y-intercept

local extrema

intervals where increasing

intervals where decreasing

intervals where concave upward

intervals where concave downward

inflection points