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Graphs of Negative Fractional Powers x^(-p/q)

confusedatmath

New member
Jan 2, 2014
14
Can someone explain how these graphs are drawn. How does the value of p/q affect this graph? How does the domain and range change? How are the asymptotes found?

The below is an image about what I'm talking about:

q1a.jpg

Here is a question the deals with this type of graph (no idea how to solve it because i'm unfamiliar with these kind of graphs)

q1b.jpg
 

ZaidAlyafey

Well-known member
MHB Math Helper
Jan 17, 2013
1,667
Think about the domain as where the function is defined. For example, if you think of a fraction with a polynomial in the denominator then it it is defined for all numbers except for the zeros of this polynomial. If you have a square root then it has to be defined for only positive integers. If you have both then you have to take care of both conditions. As for the range it is a little bit tricker to work with but for the most time you can guess it.

Take the following example

\(\displaystyle f(x)=\frac{1}{x+a}\)

What is the domain, range and horizontal and vertical asymptotes ?