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Use a graphing calculator to assist you in finding the roots of the function.

Use a graphing calculator to assist you in finding the roots of the function.-example-1

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Given the function below


f(x)=3x^4-26x^2-9

The graph of the given function is

Using a graphing calculator,

The roots of the given function are


x=\frac{i\sqrt[]{3}}{3},-\frac{i\sqrt[]{3}}{3},3,-3

Hence, the answer is the third option

Use a graphing calculator to assist you in finding the roots of the function.-example-1
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