$\"\"$

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The function $\"\"$ .

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Observe the graph:

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The function is discontinuous at $\"\"$ and $\"\"$ .

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The function is continuous for all values of $\"\"$ , except at $\"\"$ and $\"\"$ .

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$\"\"$

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The domain of a function is all values of $\"\"$ , those makes the function mathematically correct .

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Denominator of the function should not be zero.

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$\"\"$ .

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$\"\"$

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

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

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The domain of $\"\"$ is all real numbers except at $\"\"$ and $\"\"$ .

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The function $\"\"$ is continuous for all value of $\"\"$ except at $\"\"$ and $\"\"$ .

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At $\"\"$ and $\"\"$ function $\"\"$ have non removable discontinuity.

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$\"\"$ has a discontinuity at $\"\"$ and $\"\"$ .

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$\"\"$

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Discontinuous at $\"\"$ and $\"\"$ .