Misprints and Comments

for

Selwyn Hollis, CalcLabs with Mathematica, Brooks/Cole, Pacific Grove CA, edition 2001.

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page 61:  in the third line from the bottom of the page,

               place a comma after   Point[{, ndf[k]}]}]  so that it looks like  Point[{, ndf[k]}]}],

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page 116:  The computation for Example 4.3.4 in our textbook was done with Version 3.0 (or equivalent) of MATHEMATICA.  Versions  4.1 and 4.2 do not yield such simple Output.  To see how the Output for these later versions may be simplified, see our notebook for Chapter 4. 

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page 128:  in the third line from the bottom of the page,

               replace   3. + (-1)^(i-1);       with      3. + (-1)^(i);

so that the coefficients have the pattern    1, 4, 2, 4, 2, 4,  etc   rather than   1, 2, 4, 2, 4, 2,  etc. 

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page 136:  at the bottom of the page,  set    solns =  Sort[ solns ]    Out textbook was evidently evaluated with with  Version 3.0 or equivalent of MATHEMATICA.  Versions 4.1 and 4.2 list the elements of   solns   in a different order.  By using   Sort[  ] to arrange those elements in increasing order, we obtain the list having the elements in the same order as at the bottom of page 136.  Then, the textbook's next command is applicable.

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There are several places where the evaluations done with Version 4.1 of MATHEMATICA are less satisfactory than (or even incorrect) when compared to the corresponding evaluations done with Version 3.0 .

This is the situation for Example 5.3.1 on page 141 where Version 4.1 yields an incorrect answer.  This error was corrected in Version 4.2.   (See the comments about this in the notebook for Chapter 4.)

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page 161,   Exercise 1:  In place of   y'(t) = t^2 - 2y  it should have  y'(t) = t^2 - y .

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page 209:  in the only three lines of Input at the bottom of page 209,  either replace lissajousFigs with pix or replace pix with lissajousFigs

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