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\noindent Quiz 1

\noindent Math 230, Spring `99
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\noindent 1. Find the solution $y(t)$ of the differential
equation $y' - \displaystyle{\frac{y}{t}} = t e^t$ 
that satisfies the initial condition $y(1) = 2e$. 
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\noindent Extra Credit (2 points): Direction fields for two differential
equations are shown on the back of this page.  One of the two corresponds
to a {\it linear} differential equation.   Which one is it, and (briefly)
why?
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