page 277

  1. #28 MATH

    MATH . Since denominator is always positive, the critical numbers are at $x=0$ and $x=-2.$ *Use this information to see if you can find the local max/min for $f.$

  2. #26. MATHthis function looks like MATH the vertex is $t=\frac{4}{3}.$Since function has a sharp corner at $t=\frac{4}{3},$this is the critical number and function has a minimum at this point. Note that $g^{\prime }(t)=3>0$ when $t>4/3,$ and MATH when $t<4/3.$