\input notes

\nopagenumbers

\leavevmode
\vbox{\halign{\bf#\hss\cr Math 225: Calculus III\cr
Quiz 9\quad Apr. 5/7, 1994\cr
}}
\hfill
\vbox{\halign{#\cr \hbox to 2.5truein{Name:\hrulefill}\cr
\hbox to 2.5truein{Section:\hrulefill}\cr
}}

\bigskip
1.  Describe the set of points where the divergence of the vector field
$$\F =  -12x^2y z^3\i + 4y^3z^3\j + 3x^2z^4\k$$
vanishes: $\div \F = 0$. 

\vskip 3in


2.  Let $\F = \cos(y)\i - \sin(z)\j + x\k$.
Compute $\curl \F$.
 
\vskip 3in

\bye
