$\"\"$

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The function is $\"\"$ .

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Differentiate on each isde with respect to $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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Newtons Formula : $\"\"$ .

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$\"\"$

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Substitute $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Newtons Formula : $\"\"$ .

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$\"\"$

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$\"\"$ .

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Perform newton approximation for $\"\"$ .

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Newtons formula : $\"\"$ .

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$\"\"$

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$\"\"$ .

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Perform newton approximation for $\"\"$ .

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Newtons formula : $\"\"$ .

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$\"\"$

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$\"\"$ .

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Perform newton approximation for $\"\"$ .

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Newtons formula : $\"\"$ .

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$\"\"$

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$\"\"$

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Newton formula : $\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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Graph :

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Draw a coordinate palne.

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Graph the function $\"\"$ .

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$\"\"$

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Observe the graph.

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The graph of the function touches the $\"\"$ -axis at $\"\"$ .

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Hence the zero of the function is $\"\"$ .

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$\"\"$

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Zero of the function is $\"\"$ .