AP Calculus AB : Fundamental Theorem of Calculus

Study concepts, example questions & explanations for AP Calculus AB

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Example Questions

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Example Question #1 :Fundamental Theorem Of Calculus

Evaluate.

Possible Answers:

不exist

Correct answer:

Explanation:

Even though an antideritvative ofdoes not exist, we can still use the Fundamental Theorem of Calculus to "cancel out" the integral sign in this expression.

. Start

. You can "cancel out" the integral sign with the derivative by making sure the lower bound of the integral is a constant, the upper bound is a differentiable function of,, and then substitutingin the integrand. Lastly the Theorem states you must multiply your result by(similar to the directions in using the chain rule).

.

Example Question #2 :Fundamental Theorem Of Calculus

The graph of a functionis drawn below. Select the best answers to the following:

Pbstm

What is the best interpretation of the function?

Which plot shows the derivative of the function?

Possible Answers:

Wrngan2

Wrn4

Question 10 correct answer

Wrong3q10

Correct answer:

Question 10 correct answer

Explanation:

The functionrepresents the area under the curvefromto some value of.

Do not be confused by the use ofin the integrand. The reason we useis because are writing the area as a function of, which requires that we treat the upper limit of integration as a variable. So we replace the independent variable ofwith a dummy indexwhen we write down the integral. It does not change the fundamental behavior of the functionor.

The graph of the derivative ofis the same as the graph for. This follows directly from the Second Fundamental Theorem of Calculus.

If the functionis continuous on an intervalcontaining, then the function defined by:

has for its' derivative.

Example Question #3 :Fundamental Theorem Of Calculus

Evaluate

Possible Answers:

Correct answer:

Explanation:

Here we could use the Fundamental Theorem of Calculus to evaluate the definite integral; however, that might be difficult and messy.

Instead, we make a clever observation of the graph of

Namely, that

This means that the values of the graph when comparing x and -x are equal but opposite. Then we can conclude that

Example Question #1 :Fundamental Theorem Of Calculus

Wolframalpha--plot_piecewisexxlt03-x0ltxlt213-xxgt2--2013-09-10_1008

Find

Possible Answers:

不exist

Correct answer:

不exist

Explanation:

The one side limits are not equal: left is 0 and right is 3

Example Question #1 :Fundamental Theorem Of Calculus

Wolframalpha--plot_piecewisexxlt03-x0ltxlt213-xxgt2--2013-09-10_1008

Which of the following is a vertical asymptote?

Possible Answers:

Correct answer:

Explanation:

When方法3,approaches.

Vertical asymptotes occur atvalues. The horizontal asymptote occurs at

.

Example Question #2 :Fundamental Theorem Of Calculus

What are the horizontal asymptotes of?

Possible Answers:

Correct answer:

Explanation:

Compute the limits ofasapproaches infinity.

Example Question #7 :Fundamental Theorem Of Calculus

Write the domain of the function.

f(x)=\frac{(x^{4}-81)^{1/2}}{x-4}

Possible Answers:

Correct answer:

Explanation:

The answer is

The denominator must not equal zero and anything under a radical must be a nonnegative number.

Example Question #3 :Fundamental Theorem Of Calculus

What is the value of the derivative ofat x=1?

Possible Answers:

Correct answer:

Explanation:

First, find the derivative of the function, which is:

Then, plug in 1 for x:

The result is.

Example Question #3 :Calculus 3

Evaluate the following limit:

\lim_{x\rightarrow \infty }\frac{1-x^4}{x^2-4x^4}

Possible Answers:

\infty

\frac{1}{4}

不exist.

\frac{1}{2}

Correct answer:

\frac{1}{4}

Explanation:

First, let's multiply the numerator and denominator of the fraction in the limit by\frac{1}{x^{4}}.

\lim_{x\rightarrow \infty }\frac{1-x^4}{x^2-4x^4}=\lim_{x\rightarrow \infty }\frac{(\frac{1}{x^4})(1-x^4)}{\frac{1}{x^{4}}(x^2-4x^4)}

=\lim_{x\rightarrow \infty }\frac{\frac{1}{x^4}-1}{\frac{1}{x^2}-4}

Asbecomes increasingly large the\frac{1}{x^{4}}and\frac{1}{x^{2}} ^{}terms will tend to zero. This leaves us with the limit of.

\lim_{x\rightarrow \infty }\frac{-1}{-4}=\frac{1}{4}.

The answer is\frac{1}{4}.

Example Question #1 :Fundamental Theorem Of Calculus

Letandbe inverse functions, and let

.

What is the value of?

Possible Answers:

Correct answer:

Explanation:

Sinceandare inverse functions,. We can differentiate both sides of the equationwith respect toto obtain the following:

g'(f(x))\cdot f'(x)=1

We are asked to find, which means that we will need to find这样. The given information tells us that, which means that. Thus, we will substitute 3 into the equation.

g'(f(3))\cdot f'(3)=1

The given information tells us that.

The equation then becomesg’(4)\ cdot (2) = 1.

We can now solve for.

g'(4)=-\frac{1}{2}.

The answer is-\frac{1}{2}.

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