Concept explainers
To show: The domain restriction of a rational function when denominator divides evenly into numerator.
Explanation of Solution
Proof: A rational function is described as the ratio of two polynomial functions, whose coefficient or the values taken by the function is not necessary to be a rational function.
The domain restriction of a rational function can be defined by setting the denominator equals to zero and simplify it.
The x- values at which rational number is not defined or whose denominator equals to zero is termed as singularities. Singularities of a rational functions can be identified by factorizing the numerator and denominator of rational function, whether or not the linear factor in the denominator divides evenly with a linear factor in the numerator singularity of the function is equal to zero.
For example −
Let
The domain is restricted at
On solving the domain includes all
Chapter 2 Solutions
PRECALCULUS W/LIMITS:GRAPH.APPROACH(HS)
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