again, if you could show me the steps, i would appreciate it... *sigh* :-/

Find locations (ordered pairs) of all absolute extrema for the following functions with the specified domains:

a) f(x) = 1-x/3+x [0,3]

b) f(x) = x/x^2+2 [0,4]

thanks again, i tried working all of these out on my own, but i'm getting nowhere close to a solution...