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Problem 23

$23-36=$ Find the critical numbers of the functio…


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Problem 22

$15-22=$ Sketch the graph of $f$ by hand and use your sketch to
find the absolute and local maximum and minimum values of $f .$
(Use the graphs and transformations of Sections $1.2 . )$
$$f(x)=\left\{\begin{array}{ll}{4-x^{2}} & {\text { if }-2 \leqslant x<0} \\ {2 x-1} & {\text { if } 0 \leqslant x \leqslant 2}\end{array}\right.$$


local and abs. min. $(0,-1)$


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