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# Appendix D. Solutions to Problems

This appendix provides solutions to selected problems in Chapters 1, 2, 4, 5, and 6.

# Section 1.7

 3 Factor[45 + 63 x + 32 x^2 + 16 x^3 + 3 x^4 + x^5] 7 The letter J (red) in BesselJ[2, r, J] is an excess argument; both it and the comma to its left should be removed. The symbol pi (blue) is a global symbol that has no value assigned; it should be Pi, which is the Mathematica name for the constant π. BoxRatio (red) is an unrecognized option name; it should be BoxRatios. The first left curly bracket (purple) to the right of ViewPoint and the last right square bracket (purple) of the input are syntax errors; they should be removed. The correct input is ParametricPlot3D[ {r Cos[theta], r Sin[theta], BesselJ[2, r]Sin[2 ...

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