AP Calculus AB 2025 Free-Response Questions

AP Calculus AB 2025 Free-Response Questions

AP Calculus AB 2025 Free-Response Questions provide students with essential practice for the AP exam. This resource includes two sections with a total of six free-response questions covering various calculus concepts. Topics include the average rate of change, volume calculations, and the analysis of functions. Designed for AP Calculus students, this document helps reinforce understanding of key calculus principles and prepares students for the May exam. Each question requires detailed solutions and justifications, making it an invaluable study tool.

Key Points

  • Includes six free-response questions for AP Calculus AB 2025 exam preparation.
  • Covers topics such as average rate of change and volume calculations.
  • Requires detailed solutions and justifications for each question.
  • Designed to reinforce understanding of key calculus concepts for students.
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/ 9
2025
AP
®
Calculus AB
Free-Response Questions
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of College Board. Visit College Board on the web: collegeboard.org.
AP Central is the official online home for the AP Program: apcentral.collegeboard.org.
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AP CALCULUS AB 2025
n
FREE-RESPONSE QUESTIONS
CALCULUS AB
SECTION II PART A
TIME – 30 MINUTES
Directions:
Section II, Part A has 2 free-response questions and lasts 30 minutes.
A graphing calculator is required for the questions on this part of the exam. You may use
a handheld graphing calculator or the calculator available in this application.Make sure your
calculator is in radian mode.
You may use the available paper for scratch work, but you must write your answers in the free-
response booklet. In the free-response booklet, write your solution to each part of each question in
the space provided for that part. For questions that have sub-parts, be sure to label those clearly in
your solution. Use a pencil or a pen with black or dark blue ink.
You are permitted to use your calculator to solve an equation, find the derivative of a function at
a point, or calculate the value of a definite integral. However, you must clearly indicate the setup
of your question, namely the equation, function, or integral you are using. If you use other built-in
features or programs, you must show the mathematical steps necessary to produce your results.
Show all of your work, even though a question may not explicitly remind you to do so. Clearly label
any functions, graphs, tables, or other objects that you use. Justifications require that you give
mathematical reasons and that you verify the needed conditions under which relevant theorems,
properties, definitions, or tests are applied. Your work will be scored on the correctness and
completeness of your methods as well as your answers. Answers without supporting work will
usually not receive credit.
Your work must be expressed in standard mathematical notation rather than calculator syntax. For
example,
xdx
2
1
5
y
may not be written as
,,,
fnIn
tX X15
2
_i
.
Unless otherwise specified, answers (numeric or algebraic) need not be simplified. If you use
decimal approximations in calculations, your work will be scored on accuracy. Unless otherwise
specified, your final answers should be accurate to three places after the decimal point.
Unless otherwise specified, the domain of a function f is assumed to be the set of all real numbers x
for which
fx
_i
is a real number.
You can go back and forth between questions in this part until time expires. The clock will turn red
when 5 minutes remain—the proctor will not give you any time updates or warnings.
Note: This exam was originally administered digitally. It is presented here in a format optimized for
teacher and student use in the classroom.
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© 2025 College Board.
AP CALCULUS AB 2025
n
FREE-RESPONSE QUESTIONS
1. An invasive species of plant appears in a fruit grove at time
t 0
=
and begins to spread. The
function C defined by
..
arctan
Ct t
76 02
=
__ii
models the number of acres in the fruit grove
affected by the species t weeks after the species appears. It can be shown that
Ct
t
25
38
2
=
+
l
_i
.
(Note: Your calculator should be in radian mode.)
A. Find the average number of acres affected by the invasive species from time
t 0
=
to time
t 4
=
weeks. Show the setup for your calculations.
B. Find the time t when the instantaneous rate of change of C equals the average rate of change
of C over the time interval
t04##
. Show the setup for your calculations.
C. Assume that the invasive species continues to spread according to the given model for all
times
t 0>
. Write a limit expression that describes the end behavior of the rate of change in
the number of acres affected by the species. Evaluate this limit expression.
D. At time
t 4
=
weeks after the invasive species appears in the fruit grove, measures are taken
to counter the spread of the species. The function A, defined by
. lnAt Ct xdx01·
=-
,
models the number of acres affected by the species over the time interval
t43
6
##
. At what
time t, for
t43
6
##
, does A attain its maximum value? Justify your answer.
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End of Document
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FAQs of AP Calculus AB 2025 Free-Response Questions

What types of questions are included in the AP Calculus AB 2025 Free-Response section?
The AP Calculus AB 2025 Free-Response section includes a variety of questions that assess students' understanding of calculus concepts. Questions cover topics such as the average rate of change, area under curves, and the behavior of functions. Students are required to provide detailed solutions and justifications for their answers, demonstrating their grasp of calculus principles. This format helps prepare students for the types of questions they will encounter on the actual AP exam.
How can students effectively use the AP Calculus AB Free-Response Questions for exam preparation?
Students can use the AP Calculus AB Free-Response Questions as a practice tool to enhance their problem-solving skills. By working through each question, students can identify areas where they need further review or practice. Additionally, providing detailed solutions helps reinforce their understanding of calculus concepts and improves their ability to communicate mathematical reasoning. Practicing under timed conditions can also help students manage their time effectively during the actual exam.
What is the significance of justifying answers in AP Calculus Free-Response Questions?
Justifying answers in AP Calculus Free-Response Questions is crucial as it demonstrates a student's understanding of the underlying concepts. The AP exam emphasizes not only the correct answer but also the reasoning behind it. This requirement encourages students to think critically about their solutions and articulate their thought processes clearly. Justifications can include mathematical reasoning, the application of theorems, and the use of calculus principles, all of which are essential for success in higher-level mathematics.
What topics are emphasized in the AP Calculus AB Free-Response Questions?
The AP Calculus AB Free-Response Questions emphasize key calculus topics such as derivatives, integrals, and the analysis of functions. Specific areas include the average rate of change, the Fundamental Theorem of Calculus, and applications of integration. These topics are integral to the AP Calculus curriculum and are designed to challenge students' understanding and application of calculus concepts. Mastery of these areas is essential for performing well on the AP exam.
How do the AP Calculus AB Free-Response Questions align with the exam format?
The AP Calculus AB Free-Response Questions are designed to closely align with the format and expectations of the actual AP exam. Each question mimics the style and complexity of those found on the test, allowing students to familiarize themselves with the types of problems they will encounter. This alignment helps students develop the necessary skills to approach the exam confidently and effectively. Practicing with these questions can lead to improved performance on the exam.

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