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# View of /branches/UGA/4.3.5.pg

Sat Jul 24 17:09:50 2010 UTC (2 years, 10 months ago) by ted shifrin
File size: 1660 byte(s)
Log message

    1 ## DESCRIPTION
2 ## Linear Algebra
3 ## ENDDESCRIPTION
4
5 ## KEYWORDS('bases' 'basis' 'matrix' 'linearly independent')
6 ## Tagged by tda2d
7
8 ## DBsubject('Linear Algebra')
9 ## DBchapter('Vector Spaces')
10 ## DBsection('Bases')
11 ## Date('')
12 ## Author('modified by Shifrin')
13 ## Institution('TCNJ')
14 ## TitleText1('')
15 ## EditionText1('')
16 ## AuthorText1('')
17 ## Section1('')
18 ## Problem1('')
19
20 DOCUMENT();        # This should be the first executable line in the problem.
21
23 "PG.pl",
24 "PGbasicmacros.pl",
25 "PGchoicemacros.pl",
27 "PGgraphmacros.pl",
28 "PGmatrixmacros.pl",
29 "PGnumericalmacros.pl",
30 "PGauxiliaryFunctions.pl",
31 "PGmorematrixmacros.pl",
32 "MathObjects.pl"
33 );
34
35 TEXT(beginproblem());
36 $showPartialCorrectAnswers = 1; 37 38 Context("Vector"); 39 40$x = ColumnVector(-2,3,0);
41 $y = ColumnVector(6,-1,5); 42 43 # Make a new checkbox multiple choice 44$cmc1 = new_checkbox_multiple_choice();
45 # $cmc now "contains" the checkbox multiple choice object. 46 47 # Insert some questions and matching answers in the q/a list 48$cmc1 -> qa (
49              "Determine if $$W$$ is a basis for $${\mathbb R}^3$$ and check the correct answer(s) below.",
50         " $$W$$ is not a basis because it does not span $${\mathbb R}^3$$.",
51 );
52
53 # Insert some incorrect answers
54 $cmc1 -> extra( 55 " $$W$$ is a basis.", 56 " $$W$$ is not a basis because it is linearly dependent.", 57 ); 58 59 Context()->texStrings; 60 BEGIN_TEXT 61 62 Let $$W$$ be the set $$\left\{"\{"\} x, y \right\}$$. 63$PAR
64 \{$cmc1 -> print_q \} 65$BR
66 \{$cmc1 -> print_a \} 67 68 END_TEXT 69 70 ANS(checkbox_cmp($cmc1->correct_ans )   ) ;
71
72 ENDDOCUMENT();       # This should be the last executable line in the problem.