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Quiz 9\quad Nov.~17/19, 1992\cr
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1. Compute the volume of the portion of the solid sphere
$x^2 + y^2 + z^2 \le 2$
that lies above the plane $z = 1$.

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2. Compute the Jacobian $\partial(x,y)\over \displaystyle \partial(u,v)$ of the change of variables
$$x = e^{-u}\cos(v),\qquad y = e^{-u}\sin(v)$$
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