anonymous
  • anonymous
Areas in the plane
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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geerky42
  • geerky42
Cool.
anonymous
  • anonymous
The first question. Number 13 :(
geerky42
  • geerky42
Find two areas separately.

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anonymous
  • anonymous
yes but I get confused on putting the limits for integration. And is it better to integrate in terms of y?
geerky42
  • geerky42
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?
anonymous
  • anonymous
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
geerky42
  • geerky42
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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