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Document 249
Real outcome for cube root
Version: 3.0 - Scientific WorkPlace & Scientific Notebook
Problem
In SWP 3.0, if you enter
and then choose Evaluate Numerically from the
Maple menu, the value that is returned is an
imaginary number instead of a real number.
Solution
The Maple function that is most appropriate here is the surd command. To
access and use the function, follow these instructions:
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From the Maple menu, choose
Define and then choose
Define Maple Name.
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In the Maple name box, enter
surd(x,n).
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In the Scientific WorkPlace name box, enter
s(x,n).
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Choose OK.
You have now defined a function with two parameters. The first is the radicand
of the expression and the second is the radix.
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Test that you can properly access the command:
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From the Insert menu, choose
Math, or click the Math/Text button.
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Enter s(8,3).
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From the Maple menu, choose
Evaluate.
If you get an answer of 2, you have properly accessed the surd command through
the Maple library.
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Make sure you're in mathematics (the Math/Text button appears as M).
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Enter s(-100,3).
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From the Maple menu, choose
Evaluate Numerically.
The system should return -4.64... as the answer.
Revised 05/03/02
This document was created with Scientific WorkPlace.
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