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Ratzinger
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http://planetmath.org/encyclopedia/CPlace.html, how do I rewrite (2) to get the third equation R(z)=... ?
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A rational function is a mathematical expression in the form of f(x) = p(x)/q(x), where p(x) and q(x) are polynomials and q(x) is not equal to 0. It represents the ratio of two polynomial functions.
Rational functions can be difficult to solve in their original form, so rewriting the equation can make it easier to find the solution. By rewriting the equation, we can often simplify it and eliminate any restrictions on the variable.
To rewrite an equation to get R(z) = ..., you need to isolate the rational function on one side of the equation. This involves manipulating the equation using algebraic rules, such as combining like terms and using inverse operations.
The domain of a rational function is the set of all possible values for the variable that make the function defined. In other words, it is the set of all values for the variable that do not result in a denominator of 0.
The process for solving rational functions involves rewriting the equation to get R(z) = ..., determining the domain, finding any vertical or horizontal asymptotes, and solving for the variable by setting the numerator and denominator equal to 0 and solving for the variable. The solution should then be checked for any extraneous solutions.