AP Calculus BC : Estimating Limits from Graphs and Tables

Study concepts, example questions & explanations for AP Calculus BC

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Example Questions

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Example Question #2 :Limits

For the piecewise function:

, find.

Possible Answers:

Any real number.

Does not exist.

Correct answer:

Explanation:

The limitindicates that we are trying to find the value of the limit asapproaches to zero from the right side of the graph.

From right to left approaching, the limit approaches to 1 even though the value atof the piecewise function does not exist.

The answer is.

Example Question #1 :Limits

Screen shot 2015 07 07 at 1.28.45 pm

Given the graph ofabove, what is?

Possible Answers:

Correct answer:

Explanation:

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

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

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

3)什么是函数值为零,这是情商ual to the first two statements?

If we look at the graph we see that asapproaches zero from the left thevalues approach zero as well. This is also true if we look the values asapproaches zero from the right. Lastly we look at the function value at zero which in this case is also zero.

Therefore, we can observe thatasapproaches.

Example Question #4 :Limits

Screen shot 2015 07 07 at 4.36.36 pm

Given the graph ofabove, what is?

Possible Answers:

Does not exist

Correct answer:

Does not exist

Explanation:

检查上面的图,我们需要看看3个e things:

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

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

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

Therefore, we can determine thatdoes not exist, sinceapproaches two different limits from either side :from the left andfrom the right.

Example Question #5 :Limits

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 thatasapproachesfrom the right.

Example Question #1 :Limits

Screen shot 2015 08 17 at 11.29.05 am

Given the above graph of, what is?

Possible Answers:

Does Not Exist

Correct answer:

Does Not Exist

Explanation:

Examining the graph, we can observe thatdoes not exist, asis not continuous at. We can see this by checking the three conditions for which a functionis continuous at a point:

  1. A valueexists in the domain of

  2. The limit ofexists asapproaches

  3. The limit ofatis equal to

Given, we can see that condition #1 is not satisfied because the graph has a vertical asymptote instead of only one value forand is therefore an infinite discontinuity at.

We can also see that condition #2 is not satisfied becauseapproaches two different limits:from the left andfrom the right.

Based on the above, condition #3 is also not satisfied becauseis not equal to the multiple values of.

Thus,does not exist.

Example Question #2 :Estimating Limits From Graphs And Tables

Limitplot

Possible Answers:

Correct answer:

Explanation:

Example Question #1 :Estimating Limits From Graphs And Tables

Limitplot

Possible Answers:

Correct answer:

Explanation:

Example Question #9 :Limits

Limitplot

Possible Answers:

Correct answer:

Explanation:

Example Question #2 :Limits

Limitplot

Possible Answers:

Correct answer:

Explanation:

Example Question #1 :Estimating Limits From Graphs And Tables

Limitplot

Possible Answers:

Correct answer:

Explanation:

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