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onegirl

  • one year ago

Evaluate the indicated integral.

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  1. onegirl
    • one year ago
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  2. onegirl
    • one year ago
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    ok

  3. Euler271
    • one year ago
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    let u = x^3; du = 3x^2 dx

  4. onegirl
    • one year ago
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    what do i do next?

  5. Euler271
    • one year ago
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    1/3 integral of cosu du

  6. Euler271
    • one year ago
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    make the substitution literally. for u and du

  7. Euler271
    • one year ago
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    x^2dx = du/3

  8. onegirl
    • one year ago
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    ok

  9. Euler271
    • one year ago
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    integral of cosu du= sinu

  10. onegirl
    • one year ago
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    okay

  11. onegirl
    • one year ago
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    so thats it?

  12. Euler271
    • one year ago
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    then u re-plug in the subsitution. final answer should be 1/3 (sin(x^3))

  13. Euler271
    • one year ago
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    + C

  14. onegirl
    • one year ago
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    okay

  15. onegirl
    • one year ago
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    okay

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