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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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Several pages on description of inverse functions, how to derive them, and some specific examples, some of which are only for more advanced students.
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S.O.S. Math
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In this video, Salman Khan of Khan Academy explains polynomial approximation of functions. Part 5 of 7.
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Khan Academy
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A discussion relating polynomials and exponential growth.
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Ask Dr. Math
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A discussion of signs and roots.
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Ask Dr. Math
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A discussion exploring the differences between the general form and a particular function.
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Ask Dr. Math
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A discussion of finding the solutions to a function, and being sure you've got them all.
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Ask Dr. Math
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This website contains a detailed analysis on the algebra involved in solving for the general solutions to cubic and quartic equations. Multiple methods and some examples are presented.
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Ask Dr. Math
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An overview of how to handle exponents on polynomials
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algebraHelp.com
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