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Algebra/Rational functions

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Expert: - 6/3/2010


Question
What are the limitations on domain in the graph of rational functions?

Answer
The domain of a function y = f(x) are all the possible choices for x.

The values of x that can't work are those that give rise to squareroots of negatives, dividing by zero, an certain trig functions, like tan(π/2), sec(π/2), or csc(0) where the angle is in radians.

These restrctions may put a hole in the graph or make the graph go to ±∞.

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