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Ch. 4 - Applications of Derivatives
Hass - Thomas' Calculus 15th Edition
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모든 교과서Hass 15th EditionCh. 4 - Applications of Derivatives문제 4.7.31
4장, 문제 4.7.31

Finding Indefinite Integrals


In Exercises 17–56, find the most general antiderivative or indefinite integral. You may need to try a solution and then adjust your guess. Check your answers by differentiation.


∫2x(1 − x⁻³) dx

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First, rewrite the integrand to simplify the expression. Distribute \$2x$ across the terms inside the parentheses: \(2x(1 - x^{-3}) = 2x - 2x \cdot x^{-3}\).
Simplify the second term by combining the powers of \(x\): \(2x - 2x^{1 + (-3)} = 2x - 2x^{-2}\).
Express the integral as the sum of two separate integrals: \(\int 2x \, dx - \int 2x^{-2} \, dx\).
Integrate each term using the power rule for integration, which states \(\int x^{n} \, dx = \frac{x^{n+1}}{n+1} + C\) for \(n \neq -1\).
After integrating, combine the results and add the constant of integration \(C\). Remember to verify your answer by differentiating it to ensure it matches the original integrand.

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주요 개념

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Indefinite Integral (Antiderivative)

An indefinite integral represents the most general form of the antiderivative of a function, including a constant of integration. It reverses differentiation and is expressed without limits, showing all possible functions whose derivative matches the integrand.
추천 영상:
가이드 코스
05:04
Introduction to Indefinite Integrals

Integration by Simplification

This technique involves algebraically manipulating the integrand to a simpler form before integrating. For example, expanding or rewriting expressions like 2x(1 − x⁻³) into separate terms makes it easier to apply basic integration rules.
추천 영상:
가이드 코스
06:18
Integration by Parts for Definite Integrals

Verification by Differentiation

After finding an antiderivative, differentiating it should return the original integrand. This step confirms the correctness of the integral and helps identify any errors in the integration process.
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가이드 코스
05:53
Finding Differentials
관련 실천
교과서 질문

Sketch the graphs of the rational functions in Exercises 53–60.


𝓍²

y = ------------------

𝓍² ― 4

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교과서 질문

113. If b, c, and d are constants, for what value of b will the curve y = x^3 + bx^2 + cx + d have a

point of inflection at x = 1? Give reasons for your answer.

252
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교과서 질문

Checking the Mean Value Theorem


Which of the functions in Exercises 7–12 satisfy the hypotheses of the Mean Value Theorem on the given interval, and which do not? Give reasons for your answers.


f(x) = {x² − x, −2 ≤ x ≤−1

2x² − 3x − 3, −1 < x ≤ 0

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교과서 질문

Absolute Extrema on Finite Closed Intervals


In Exercises 21–36, find the absolute maximum and minimum values of each function on the given interval. Then graph the function. Identify the points on the graph where the absolute extrema occur, and include their coordinates.


g(x) = √(4 − x²), −2 ≤ x ≤ 1

305
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교과서 질문

Checking Antiderivative Formulas


Verify the formulas in Exercises 57–62 by differentiation.


∫csc²((x − 1)/3)dx = −3cot((x − 1)/3) + C

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교과서 질문

Checking the Mean Value Theorem


Which of the functions in Exercises 7–12 satisfy the hypotheses of the Mean Value Theorem on the given interval, and which do not? Give reasons for your answers.


f(x) = {sinx / x, −π ≤ x < 0

0, x = 0

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