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+%%
+%% This is file `mchoice.tex',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% probsoln.dtx (with options: `mchoice.tex,package')
+%% Copyright (C) 2006 Nicola Talbot, all rights reserved.
+%% If you modify this file, you must change its name first.
+%% You are NOT ALLOWED to distribute this file alone. You are NOT
+%% ALLOWED to take money for the distribution or use of either this
+%% file or a changed version, except for a nominal charge for copying
+%% etc.
+%% \CharacterTable
+%% {Upper-case \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
+%% Lower-case \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
+%% Digits \0\1\2\3\4\5\6\7\8\9
+%% Exclamation \! Double quote \" Hash (number) \#
+%% Dollar \$ Percent \% Ampersand \&
+%% Acute accent \' Left paren \( Right paren \)
+%% Asterisk \* Plus \+ Comma \,
+%% Minus \- Point \. Solidus \/
+%% Colon \: Semicolon \; Less than \<
+%% Equals \= Greater than \> Question mark \?
+%% Commercial at \@ Left bracket \[ Backslash \\
+%% Right bracket \] Circumflex \^ Underscore \_
+%% Grave accent \` Left brace \{ Vertical bar \|
+%% Right brace \} Tilde \~}
+\newproblem{mc:prod}{%
+Which of the following is the derivative of $x\sin(x)$?
+(Circle the correct answer.)
+\ifthenelse{\boolean{showanswers}}{}%
+{\begin{description}
+\item[A] $\sin(x)$
+\item[B] $x\cos(x)$
+\item[C] $\sin(x) + x\cos(x)$
+\end{description}
+}}{%
+\begin{description}
+\item[A] $\sin(x)$
+\item[B] $x\cos(x)$
+\item[\textcircled{C}] $\sin(x) + x\cos(x)$ (product rule).
+\end{description}
+}
+
+\newproblem{mc:quot}{%
+Which of the following is the derivative of $\frac{\sin(x)}{x}$?
+(Circle the correct answer.)
+\ifthenelse{\boolean{showanswers}}{}%
+{\begin{description}
+\item[A] $\sin(x)$
+\item[B] $\cos(x)$
+\item[C] $\frac{\cos(x)x-\sin(x)}{x^2}$
+\end{description}
+}}{%
+\begin{description}
+\item[A] $\sin(x)$
+\item[B] $\cos(x)$
+\item[\textcircled{C}] $\frac{\cos(x)x-\sin(x)}{x^2}$
+(quotient rule)
+\end{description}
+}
+\endinput
+%%
+%% End of file `mchoice.tex'.