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swin2013

  • 2 years ago

Areas in the plane

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  1. geerky42
    • 2 years ago
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    Cool.

  2. swin2013
    • 2 years ago
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    The first question. Number 13 :(

  3. geerky42
    • 2 years ago
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    Find two areas separately.

  4. swin2013
    • 2 years ago
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    yes but I get confused on putting the limits for integration. And is it better to integrate in terms of y?

  5. geerky42
    • 2 years ago
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    y? You are crazy! Integrating in term of x is MUCH easier. Don't see what it has to do with limit, but you can just set up a integration like this: \[\int_{-2}^{0}(2x^3 -x^2 -5x) - (-x^2+3x)dx + \int_0^2 (-x^2+3x) - (2x^3-x^2-5x)dx\] See what I did here?

  6. swin2013
    • 2 years ago
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    oh ok. it's because integrating with y is easier with some areas. I don't know exactly when to integrate with y and x

  7. geerky42
    • 2 years ago
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    Well, if functions are used, then just use x. If at least one of the curve don't pass vertical test, then it is better to use y.

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spraguer (Moderator)
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is replying to Can someone tell me what button the professor is hitting...

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