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+%%
+%% This is file `args.tex',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% probsoln.dtx (with options: `args.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 \~}
+
+\newcount\ctr
+\newproblem[3]{diff:quad}{%
+\(f(x) =
+\ifnum#1=0
+\else
+\ifnum#1=1\else#1\fi x^2
+\fi
+\ifnum#2=0
+\else
+\ifnum#2>0 \ifnum#1=0 \else + \fi \fi
+\ifnum#2=1\else#2\fi x
+\fi
+\ifnum#3=0
+\else
+\ifnum#3>0 \ifnum#2=0 \ifnum#1=0 \else + \fi \else + \fi\fi
+#3
+\fi\)
+}{%
+\(f'(x) =
+\ifnum#1=0
+\else
+\ctr=2
+\multiply\ctr by #1
+\the\ctr x
+\fi
+\ifnum#2=0
+\else
+\ifnum#2>0 \ifnum#1=0 \else + \fi \fi
+#2
+\fi
+\ifnum#1=0 \ifnum#2=0 0 \fi\fi
+\)
+}
+
+\newproblem[1]{diff:sin}{%
+\(f(x) = \sin(#1x)\)
+}{%
+\(f'(x) = #1\cos(#1x)\)
+}
+
+\endinput
+%%
+%% End of file `args.tex'.