View of /trunk/NationalProblemLibrary/Rochester/setAlgebra01RealNumbers/sw1_2_49a.pg

    1 ##DESCRIPTION
    2 ##   Evaluation of a simple algebraic expression
    3 ##ENDDESCRIPTION
    4 
    5 ##KEYWORDS('algebra')
    6 ## hcao tagged and PAID on 12-12-2003
    7 
    8 ## DBsubject('Algebra')
    9 ## DBchapter('Basic Algebra')
   10 ## DBsection('Real Numbers')
   11 ## Date('6/3/2002')
   12 ## Author('')
   13 ## Institution('')
   14 ## TitleText1('College Algebra')
   15 ## EditionText1('3')
   16 ## AuthorText1('Stewart, Redlin, Watson')
   17 ## Section1('1.2')
   18 ## Problem1('49a')
   19 DOCUMENT();        # This should be the first executable line in the problem.
   20 
   21 loadMacros(
   22 "PG.pl",
   23 "PGbasicmacros.pl",
   24 "PGchoicemacros.pl",
   25 "PGanswermacros.pl",
   26 "PGauxiliaryFunctions.pl",
   27 "PGcourse.pl"
   28 );
   29 
   30 TEXT(beginproblem());
   31 
   32 $a = random(25,49,1);
   33 $b = random(2,24,1);
   34 
   35 TEXT(EV2(<<EOT));
   36 Evaluate the expression
   37 \[\left| |-$a|-|-$b| \right|. \]
   38 $BR $BR \{ ans_rule(5) \}
   39 $BR
   40 EOT
   41 
   42 $answer = $a-$b;
   43 
   44 ANS(num_cmp($answer, mode=>"strict"));
   45 
   46 ENDDOCUMENT();        # This should be the last executable line in the problem.