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1 : jjholt 184 ## DESCRIPTION
2 :     ## Calculus
3 :     ## ENDDESCRIPTION
4 : jj 143
5 : jjholt 184 ## KEYWORDS ('complex','imaginary','limit')
6 :     ## Tagged by cmd6a 4/20/06
7 : jj 143
8 : jjholt 184 ## DBsubject('Calculus')
9 :     ## DBchapter('Appendixes')
10 :     ## DBsection('Complex Analytic Functions')
11 :     ## Date('')
12 :     ## Author('')
13 :     ## Institution('Rochester')
14 :     ## TitleText1('Fundamentals of Complex Analysis for Mathematics, Science, and Engineering')
15 :     ## EditionText1('')
16 :     ## AuthorText1('E.B. Saff and A.D. Snider')
17 :     ## Section1('2.2')
18 :     ## Problem1('9')
19 :    
20 : jj 143 DOCUMENT(); # This should be the first executable line in the problem.
21 :    
22 :     loadMacros(
23 :     "PG.pl",
24 :     "PGbasicmacros.pl",
25 :     "PGchoicemacros.pl",
26 :     "PGanswermacros.pl",
27 :     "PGauxiliaryFunctions.pl",
28 :     "PGcomplexmacros.pl"
29 :     );
30 :    
31 :     TEXT(beginproblem());
32 :    
33 :     $a = random( 2, 5, 1 );
34 :     $b = random( 3, 7, 1 );
35 :     $c = random( 1, 4, 1 );
36 :     $d = $c**2;
37 :    
38 :    
39 :     BEGIN_TEXT
40 :     Find each of the following limits:$PAR
41 :     (1) \(\lim_{z \to $a}{\frac{z^2\ +\ $b}{iz}}\ =\ \)\{ans_rule(10)\}$PAR
42 :     (2) \(\lim_{z \to i}{\frac{z^2\ +\ 1}{z^4\ -\ 1}}\ =\ \)\{ans_rule(10)\}$PAR
43 :     (3) \(\lim_{z \to $c+2i}{|z^2\ -\ $d|}\ =\ \)\{ans_rule(10)\}$PAR
44 :    
45 :     $PAR
46 :     END_TEXT
47 :    
48 :     ANS(cplx_cmp( new Complex( 0, -($a**2+$b)/$a ) ));
49 :     ANS(cplx_cmp( new Complex( -1/2, 0 ) ));
50 :     ANS(cplx_cmp( new Complex( sqrt( (4*$c)**2 + 16 ), 0 ) ));
51 :    
52 :     ENDDOCUMENT(); # This should be the last executable line in the problem.
53 :    

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