How to Test for Continuity?

Identify the function and the point where continuity is being tested

Check whether the function is defined at that point

Compute the limit of the function as the input approaches that point

Compute the function value at that point

Compare the limit and the function value

Verify that the limit exists

Verify that the left-hand limit and right-hand limit are equal

Conclude the function is continuous if the limit exists and equals the function value

Conclude the function is not continuous if any condition fails

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