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Describe the end behavior of each function f(x)=x^3-4x^2+5

User Lima
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1 Answer

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19 votes

Solution:

The determine the end behavior of the function below


f(x)=x^3-4x^2+5

We will use the image of the function below

The end behavior of a function f describes the behavior of the graph of the function at the "ends" of the x-axis. In other words, the end behavior of a function describes the trend of the graph if we look to the right end of the x-axis (as x approaches +∞ ) and to the left end of the x-axis (as x approaches −∞ ).

Step 1:

From looking at the graph above, we can see that

Since the leading term of the polynomial (the term in the polynomial which contains the highest power of the variable) is x3, the degree is 3, i.e. odd, and the leading coefficient is 1, i.e. positive.

The domain of the function is given below as


-\infty<strong>Therefore,</strong><p><strong>The end behavior of the function above is</strong> </p>[tex]\begin{gathered} x\rightarrow+\infty,f(x)\rightarrow+\infty,\text{and} \\ x\rightarrow-\infty,f(x)\rightarrow-\infty \end{gathered}

Describe the end behavior of each function f(x)=x^3-4x^2+5-example-1
User Ayoub Benayache
by
2.6k points
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