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Name (Last, First): $\underline{\hspace{3in}}$ \hfill Student ID: $\underline{\hspace{2in}}$

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{\small
  \href{\myurl}{Dror Bar-Natan}:
  \href{\myurl/classes/}{Classes}:
  \href{\myurl/classes/\#1516}{2015-16}:
  \href{\myurl/classes/16-475-ProblemSolving}{MAT 475 Problem Solving Seminar}:
  \hfill\url{http://drorbn.net/16-475}
}

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{\large\bf Quiz 5} on February 11, 2016: ``Modify the Problem'' / ``Choose an Effective Notation''. You have 22 minutes to solve the problems below. Please write on both sides of the page. \hfill {\bf Good Luck!}

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\noindent{\bf Problem 1} (Larson's 1.4.4, modified). Let $\lambda$ be a positive real number. Compute $\displaystyle \int_{-\infty}^\infty e^{-\lambda x^2/2}dx$.

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\noindent{\bf Problem 2} (Larson's 1.5.8). Let $P_1,P_2,\ldots,P_{12}$ be the
vertices of a regular 12-gon. Are the diagonals $P_1P_9$, $P_2P_{11}$ and
$P_4P_{12}$ concurrent?

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