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Quiz 4\quad Feb 15/17, 1994\cr
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1. Suppose that $z(x,y)$ is a function of $x$ and $y$, and that $x = \cos(u v)$
and $y = \sin(u/v)$. If $z_x(-1,0) = 3$ and $z_y(-1,0) = 1$, find ${\partial
z\over \partial v}$ when $u = \pi$ and $v = 1$.
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2. Find the slope of the line tangent to curve defined by the intersection of
$z = x^3y-y^2$ and the plane $x = 3$ at the point $(3,2,50)$.
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