$\"\"$

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The function is $\"\"$ .

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The function $\"\"$ is continuous on $\"\"$ .

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For a limit to exist, the left hand limit is always equal to right hand limit.

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The function $\"\"$ is continuous at $\"\"$ .

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Consider the left hand limit $\"\"$ .

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$\"\"$

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Consider the right hand limit $\"\"$ .

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$\"\"$

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For a limit to exist, $\"\"$ .

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$\"\"$

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$\"\"$

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For a limit to exist, the left hand limit is always equal to right hand limit.

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The function $\"\"$ is continuous at $\"\"$ .

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Consider the left hand limit $\"\"$ .

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$\"\"$

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Consider the right hand limit $\"\"$ .

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$\"\"$

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For a limit to exist, $\"\"$ .

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$\"\"$

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$\"\"$

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Solve equation $\"\"$ and equation $\"\"$ .

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Multiple equation $\"\"$ with $\"\"$ .

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$\"\"$

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Subtract equation $\"\"$ from equation $\"\"$ .

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$\"\"$

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Substitute $\"\"$ in equation $\"\"$ .

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$\"\"$

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$\"\"$

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