DG_chapter_5_quiz.tex

\yourname

\activitytitle{Quiz on some problems from Chapter 5 of Daepp and Gorkin}{15 points}

\blist{5in}
\item Let $x$ and $y$ be real numbers.  Use the triangle inequality to show that $||x| - |y|| \leq |x - y|$.

\item Prove or refute the following conjecture:  There are no positive integers $x$ and $y$ such that $x^2 - y^2 = 10$.  You can use the back of the sheet if you like.

\elist
\vfill          % pad the rest of the page with white space