Solution: Continuity #1

Solution: Continuity #1

The plot of [latex]f(x)[/latex] is shown below (Not to scale). At what values of [latex]x[/latex] is this function discontinuous?

continuity practice problems

The definition of continuity tells us that a function is continuous at point x = a:

 

[latex]\large{\lim_{x \to a^-} f(x) = \lim_{x \to a^+}f(x) = f(a)}[/latex]

 

Based on this, we can inspect the graph to see where this is true. At points x = 1, 2, and 4,  we can see that this is not true. Hence, the function is discontinuous as these points.

 

However, at x = 3, we can see that the left and right handed limits equal the value of the function. Hence, the function is continuous at x = 3.

 

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Solution: Continuity #1

The plot of [latex]f(x)[/latex] is shown below (Not to scale). At what values of [latex]x[/latex] is this function discontinuous?

continuity practice problems

The definition of continuity tells us that a function is continuous at x = a if:

 

 

[latex]\large{\lim_{x \to a^-} f(x) = \lim_{x \to a^+} = f(a)}[/latex]

 

 

Based on this, we can inspect the graph to see where this is true. At points x = 1, 2, and 4,  we can see that this is not true. Hence, the function is discontinuous as these points.

 

 

However, at x = 3, we can see that the left and right handed limits equal the value of the function. Hence, the function is continuous at x = 3.

 

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