Calculus 2 : Finding Limits and One-Sided Limits

Study concepts, example questions & explanations for Calculus 2

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Example Questions

Example Question #81 : Limits

Limit a 7.13

Given the graph of the function  above, what is ?

Possible Answers:

Correct answer:

Explanation:

Examining the graph, we want to find where the graph tends to as it approaches zero from the left hand side. We can see that there appears to be a vertical asymptote at zero. As the x values approach zero from the left the function values of the graph tend towards positive infinity.

Therefore, we can observe that   as  approaches  from the left.

Example Question #82 : Limits

Limit b 7.13

Given the graph of the function  above, what is ?

Possible Answers:

Correct answer:

Explanation:

Examining the graph, we want to find where the graph tends to as it approaches zero from the right hand side. We can see that there appears to be a vertical asymptote at zero. As the x values approach zero from the right the function values of the graph tend towards positive infinity.

Therefore, we can observe that   as  approaches  from the right.

Example Question #41 : Finding Limits And One Sided Limits

Evaluate the following limit:

Possible Answers:

The limit does not exist

Correct answer:

Explanation:

To evaluate the limit, simply substitute what we are approaching (5) into the function:

That we are approaching 5 from the left has no impact on the final answer. 

Example Question #84 : Limits

Limit a 7.15

Given the graph of  above, what is ?

Possible Answers:

Correct answer:

Explanation:

Examining the graph above, we need to look at three things:

1) What is the limit of the function as  approaches zero from the left?

2) What is the limit of the function as  approaches zero from the right?

3) What is the function value as  and is it the same as the result from statement one and two?

Therefore, we can observe that   as  approaches  from the left and from the right.

 

 

Example Question #1 : Estimating Limits From Graphs And Tables

Limit b 7.15

Given the above graph of , what is ?

Possible Answers:

Correct answer:

Explanation:

Examining the graph, we want to find where the graph tends to as it approaches zero from the right hand side. We can see that there appears to be a vertical asymptote at zero. As the x values approach zero from the right the function values of the graph tend towards positive infinity.

Therefore, we can observe that   as  approaches  from the right.

Example Question #85 : Limits

Limit c 7.15

Given the above graph of , what is ?

Possible Answers:

Correct answer:

Explanation:

Examining the graph, we want to find where the graph tends to as it approaches zero from the left hand side. We can see that there appears to be a vertical asymptote at zero. As the x values approach zero from the left the function values of the graph tend towards negative infinity.

Thus, we can observe that   as   approaches  from the left.

Example Question #86 : Limits

Evaluate the following limit:

, where 

Possible Answers:

The limit does not exist.

Correct answer:

Explanation:

Because this is a one sided limit, we can't simply subsitute the value into the function being evaluated. The function is piecewise, changing from one function  to a different one at . We are evaluating the limit from the right side, meaning greater than 2. We actually reach a value at 2, which is  (approaching 2 from the left - in other words, at values barely greater than 2). 

Thus,

Example Question #41 : Finding Limits And One Sided Limits

Limit a 7.16

Given the above graph of , what is ?

Possible Answers:

Correct answer:

Explanation:

Examining the graph above, we need to look at three things:

1) What is the limit of the function as  approaches zero from the left?

2) What is the limit of the function as  approaches zero from the right?

3) What is the function value as  and is it the same as the result from statement one and two?

Thus, we can observe that   as  approaches  from the left and from the right.

Example Question #42 : Finding Limits And One Sided Limits

Limit b 7.16

Given the above graph of , what is ?

Possible Answers:

Correct answer:

Explanation:

Examining the graph, we want to find where the graph tends to as it approaches zero from the right hand side. We can see that there appears to be a vertical asymptote at zero. As the x values approach zero from the right the function values of the graph tend towards negative infinity.

Therefore, the graph, we can observe that   as  approaches  from the right.

Example Question #43 : Finding Limits And One Sided Limits

Limit c 7.16

Given the above graph of , what is ?

Possible Answers:

Correct answer:

Explanation:

Examining the graph, we want to find where the graph tends to as it approaches zero from the left hand side. We can see that there appears to be a vertical asymptote at zero. As the x values approach zero from the left the function values of the graph tend towards positive infinity.

Therefore, the graph, we can observe that   as  approaches  from the left.

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