Precalculus : Determine if a Function is Continuous Using Limits
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Example Question #1 : Determine If A Function Is Continuous Using Limits
Find the domain where the following function is continuous:
The function in the numerator factors to:
so if we cancel the x+3 in the numerator and denominator we have the same function but it is continuous. The 
Example Question #1 : Determine If A Function Is Continuous Using Limits
What are the discontinuities in the following function and what are their types?
Since the factor 
Since the factor
There is no discontinuity at all at 
Example Question #662 : Pre Calculus
Determine if the function 
No, it is not continuous because the lefthand and righthand limits do not equal the value of the function at 0.
Yes, it is continuous because the lefthand and righthand limits are equal.
Yes, it is continuous because the righthand and lefthand limits are equal to the actual value of the function.
No, it is not continuous because the lefthand limit does not match the righthand limit.
Yes, it is continuous because the righthand and lefthand limits are equal to the actual value of the function.
In order to determine if a function is continuous at a point three things must happen.
1) Taking the limit from the lefthand side of the function towards a specific point exists.
2) Taking the limit from the righthand side of the function towards a specific point exists.
3) The limits from 1) and 2) are equal and equal the value of the original function at the specific point in question.
In our case,
1)
2) 
3)
Because all of these conditions are met, the function is continuous at 0.
Example Question #1 : Determine If A Function Is Continuous Using Limits
Determine if 
No, it is not continuous because the lefthand limit does not match the righthand limit.
Yes, it is continuous because the lefthand and righthand limits are equal.
No, it is not continuous because the lefthand and righthand limits do not equal the value of the function at 0.
Yes, it is continuous because the righthand and lefthand limits are equal to the actual values of the function.
Yes, it is continuous because the righthand and lefthand limits are equal to the actual values of the function.
First, find that at any point where 
Then find that
As these are all equal, it can be determined that the function is continuous on all points of its domain.
Example Question #5 : Determine If A Function Is Continuous Using Limits
Let 
As 
The 
Therefore, our function is continuous at all values of 
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