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lynnn

  • 2 years ago

Calc 3! need help!

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  1. lynnn
    • 2 years ago
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  2. slaaibak
    • 2 years ago
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    \[\int\limits_{0}^{2\pi}\int\limits_{0}^{\sqrt{7 \over 2}} [5 - (7 - 2x^2 - 2y^2)] rdrd \theta \]

  3. lynnn
    • 2 years ago
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    can't get the right answer. what is it supposed to be:)?

  4. slaaibak
    • 2 years ago
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    sorry, I forgot something \[\int\limits_{0}^{spi}\int\limits_{0}^{\sqrt{ 7\over2}} {[5 - (7 - 2r)]} rdrd \theta\]

  5. slaaibak
    • 2 years ago
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    Well, if you can't get the right answer, you obviously must know the right answer, and would not be asking for the right answer. Sorry, but I'm not going to evaluate the integral for you. That's the easy part.

  6. slaaibak
    • 2 years ago
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    There must be a 2pi in the outer integral top bound.

  7. lynnn
    • 2 years ago
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    I do not know what the answer is.

  8. slaaibak
    • 2 years ago
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    Then how can you say "can't get the right answer." ?

  9. lynnn
    • 2 years ago
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    because the answer choices are 2pi, 3pi/2, pi/2, pi, and 5pi/2. and i'm not getting one of these.

  10. slaaibak
    • 2 years ago
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    I'm suddenly very confused as to what the question asks. Must you get the volum of the area enclosed by the parabaloid and plane? Where does a cylinder come in?

  11. lynnn
    • 2 years ago
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    yeah i don't understand the question. the hint thats supposed to help me just made me confused even more

  12. slaaibak
    • 2 years ago
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    Nah I unfortunately don't know what they want, sorry.

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