View of /trunk/NationalProblemLibrary/WHFreeman/Rogawski_Calculus_Early_Transcendentals_Second_Edition/12_Vector_Geometry/12.6_A_Survey_of_Quadric_Surfaces/12.6.35.pg

    1 ## DBsubject('Calculus')
    2 ## DBchapter('Vector Geometry')
    3 ## DBsection('A Survey of Quadratic Surfaces')
    4 ## KEYWORDS('calculus')
    5 ## TitleText1('Calculus: Early Transcendentals')
    6 ## EditionText1('2')
    7 ## AuthorText1('Rogawski')
    8 ## Section1('12.6')
    9 ## Problem1('35')
   10 ## Author('JustAsk - Vladimir Finkelshtein')
   11 ## Institution('W.H.Freeman')
   12 
   13 DOCUMENT();
   14 
   15 loadMacros("PG.pl","PGbasicmacros.pl","PGanswermacros.pl");
   16 loadMacros("Parser.pl");
   17 loadMacros("freemanMacros.pl");
   18 loadMacros("PGauxiliaryFunctions.pl");
   19 loadMacros("PGgraphmacros.pl");
   20 loadMacros("PGchoicemacros.pl");
   21 
   22 TEXT(beginproblem());
   23 
   24 $cyltype=random(1,2);
   25 if($cyltype==1){$cyltype='elliptic';}
   26 if($cyltype==2){$cyltype='parabolic';}
   27 
   28 Context()->texStrings;
   29 $tf = new_select_list();
   30 $tf -> qa (
   31 "The vertical traces of $cyltype cylinders in standard form, are either one or two vertical lines or an empty set",
   32 "T",
   33 "The vertical traces of $cyltype cylinders in standard form, are either one or two vertical lines",
   34 "F",
   35 "The vertical traces of $cyltype cylinders in standard form, are either one vertical line or an empty set",
   36 "F",
   37 "The vertical traces of $cyltype cylinders in standard form, must be an empty set",
   38 "F",);
   39 $tf ->choose(1);
   40 
   41 
   42 BEGIN_TEXT
   43 \{ textbook_ref_exact("Rogawski ET 2e", "12.6","35") \}
   44 $PAR
   45 \{ $tf-> print_q \}
   46 $BR
   47 Enter T or F depending on whether the statement is true or false.
   48 (You must enter T or F -- True and False will not work.)$BR
   49 
   50 $PAR
   51 
   52 $PAR
   53 END_TEXT
   54 
   55 Context()->normalStrings;
   56 
   57 ANS(str_cmp($tf->ra_correct_ans));
   58 
   59 Context()->texStrings;
   60 SOLUTION(EV3(<<'END_SOLUTION'));
   61 $PAR
   62 $SOL
   63 $BR
   64 The vertical traces of $cyltype cylinders are either one or two vertical lines or an empty set
   65 
   66 $BR
   67 END_SOLUTION
   68 
   69 ENDDOCUMENT();