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\title{General Mathematics and Computational Science I}
\author{Exercise 7}
\date{September 25, 2007}
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\begin{enumerate}

\item Solve Ivanov, p.~15, Problem~7.

\item Solve Ivanov, p.~16, Problem~11.

Part (b) is already done in the book; submit part (a) only.

\end{enumerate}
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