Domains of Rational Expressions
- Thread starter kiwan
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pka
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@kiwan, this is a poorly posted question.
Are we to assume that you are asked to state the domain of \(\displaystyle \frac{81m^2-16}{5m+10}~\&~\frac{22x+11}{2x^2-x}~?\)
Do you understand that we cannot divide by zero so that in the first case \(\displaystyle m\ne -2~?\)
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Dr.Peterson
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I think you are asking how to find the domains of [MATH]\frac{81m^2-16}{5m+10}[/MATH] and [MATH]\frac{22x+11}{2x^2-x}[/MATH].
We'll want to see your thoughts, to show us where you need help. But a good place to start, if that's all you're asking for, is to ask yourself, "Why might it not be possible to evaluate this expression for some value of the variable?" Then you can find what values those would be; and the domain is the set of all values of the variable for which the expression can be evaluated.
We'll want to see your thoughts, to show us where you need help. But a good place to start, if that's all you're asking for, is to ask yourself, "Why might it not be possible to evaluate this expression for some value of the variable?" Then you can find what values those would be; and the domain is the set of all values of the variable for which the expression can be evaluated.