$\"\"$

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The function is $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Prove the limit $\"\"$ using $\"\"$ definition.

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To show that for each $\"\"$ , there exists a $\"\"$ such that $\"\"$ , whenever $\"\"$ .

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Since your option of $\"\"$ depends on $\"\"$ , find a connection between the absolute values $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$

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Therefore, for given $\"\"$ you can choose $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$

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$\"\"$ .