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\centerline
{
\bf ``QUIZ'' for Nov. 2, 2009
}
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{\bf NAME:} (print!) $\underline
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{\quad \bf Section:}
$\underline{\quad\quad\quad}$

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{\bf E-MAIL ADDRESS:} (print!) 
$\underline
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{\bf 1.} Sketch the vector planar vector field 
$$
{\bf F}= \langle x, y^2 \rangle \quad .
$$

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{\bf 2.}  Find a potential function for the vector field ${\bf F}$
$$
{\bf F}= \langle y \cos(xy), x \cos(xy) \rangle \quad .
$$


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