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Teacher: Prof. JM Section: AS Mathematics Grade 11
Date: Week Grade Grade 11

Volume Integration

Learning Objectives
  • Understand the concept of integration as the inverse of differentiation and its applications in calculating areas and volumes.
  • Learn to compute the indefinite integral of polynomial functions and apply integration rules such as power rule and sum rule.
  • Apply integration techniques to solve real-world problems, including finding the area under curves and solving motion-related problems.
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Student Materials:

    Name:.......................Grade....................

    Volume Integration

    Volume of Solids Using Integration Worksheet

    Question 1: Find the volume of the solid formed by rotating the curve \( y = x^2 \) about the x-axis, from \( x = 0 \) to \( x = 2 \). \[ V = \pi \int_0^2 (x^2)^2 \, dx \]

    Question 2: Find the volume of the solid formed by rotating the curve \( y = 3x \) about the x-axis, from \( x = 1 \) to \( x = 4 \). \[ V = \pi \int_1^4 (3x)^2 \, dx \]

    Question 3: Find the volume of the solid formed by rotating the curve \( y = x^3 \) about the y-axis, from \( x = 0 \) to \( x = 1 \). \[ V = 2\pi \int_0^1 x^3 \cdot x \, dx \]

    Question 4: Find the volume of the solid formed by rotating the curve \( y = \sqrt{x} \) about the x-axis, from \( x = 1 \) to \( x = 4 \). \[ V = \pi \int_1^4 (\sqrt{x})^2 \, dx \]

    Question 5: Find the volume of the solid formed by rotating the curve \( y = 2x - 1 \) about the x-axis, from \( x = 0 \) to \( x = 3 \). \[ V = \pi \int_0^3 (2x - 1)^2 \, dx \]

    Question 6: Find the volume of the solid formed by rotating the curve \( y = 4 - x^2 \) about the x-axis, from \( x = -2 \) to \( x = 2 \). \[ V = \pi \int_{-2}^2 (4 - x^2)^2 \, dx \]

    Question 7: Find the volume of the solid formed by rotating the curve \( y = x^2 + 1 \) about the y-axis, from \( x = 1 \) to \( x = 3 \). \[ V = 2\pi \int_1^3 (x^2 + 1) \cdot x \, dx \]

    Question 8: Find the volume of the solid formed by rotating the curve \( y = 5 - x \) about the x-axis, from \( x = 0 \) to \( x = 5 \). \[ V = \pi \int_0^5 (5 - x)^2 \, dx \]

    Question 9: Find the volume of the solid formed by rotating the curve \( y = 1 - x^2 \) about the x-axis, from \( x = 0 \) to \( x = 1 \). \[ V = \pi \int_0^1 (1 - x^2)^2 \, dx \]

    Question 10: Find the volume of the solid formed by rotating the curve \( y = e^x \) about the x-axis, from \( x = 0 \) to \( x = 2 \). \[ V = \pi \int_0^2 (e^x)^2 \, dx \]

    Answers:

    • Answer 1: \(\frac{16\pi}{5}\)
    • Answer 2: \( \pi \cdot 216 \)
    • Answer 3: \(\frac{\pi}{5}\)
    • Answer 4: \( \frac{15\pi}{2} \)
    • Answer 5: \(\frac{17\pi}{3}\)
    • Answer 6: \( \frac{128\pi}{5} \)
    • Answer 7: \( \frac{102\pi}{5} \)
    • Answer 8: \( \frac{250\pi}{3} \)
    • Answer 9: \( \frac{4\pi}{5} \)
    • Answer 10: \( \pi(e^4 - 1) \)
Student Materials:

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