Definition of a critical point. Above the level of most students. useful for tutors.
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MathWorld
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A helpful scientific calculator that runs in your web browser window.
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Holt Online Learning
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JAVA Applet for plotting curves defined in rectangular or parametric form.
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MIT
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Step-by-step solutions to odd-numbered problems from dozens of calculus textbooks.
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Hotmath
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Excellent site showing examples of algebra, trig, calculus, differential equations, and linear algebra.
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Paul's Online Math Notes
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Step-by-step solutions to odd-numbered problems from dozens of precalculus textbooks.
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Hotmath
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Gives a detailed explanation of working with Partial Derivatives through an example.
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Library of Math
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A website that lays out the theory of working with partial derivatives.
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Mathworld Wolfram
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Using parametric equations to define a curve in two or three dimensions and properties of parametric equations.
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MIT
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