Question 11
Locate the absolute extrema of the function $f(x) = \cos(\pi x)$ on the closed interval $[0, \frac{2}{3}]$
absolute max: $(0, 1)$; absolute min: $(\frac{2}{3}, \cos(\frac{2\pi}{3}))$
absolute max: $(\frac{2}{3}, \cos(\frac{2\pi}{3}))$; absolute min: $(0, 1)$
no absolute max; absolute min: $(0, 1)$
absolute max: $(\frac{2}{3}, \cos(\frac{2\pi}{3}))$; no absolute min