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Wislar Group Title

\[\int\limits_{}^{}\int\limits_{D}^{}y ^{2}e ^{xy}dA\]D is bounded by y=x. y=4, x=0 Set up iterated integrals for both orders of integration. Then evaluate the integral using the easier order and explain why it is easier.

  • 2 years ago
  • 2 years ago

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  1. Wislar Group Title
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    I know I can do... \[\int\limits_{0}^{4}\int\limits_{x}^{4}y ^{2}e ^{xy}dydx\]but I'm not sure what they mean by both orders of integration and how to find the other orders.

    • 2 years ago
  2. TuringTest Group Title
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    |dw:1352586388142:dw|

    • 2 years ago
  3. TuringTest Group Title
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    \[x\le y\le4,~~0\le x\le4\implies0\le x\le y,~~0\le y\le4\]

    • 2 years ago
  4. TuringTest Group Title
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    does that make any sense to you?

    • 2 years ago
  5. Wislar Group Title
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    Yep, I get that.

    • 2 years ago
  6. TuringTest Group Title
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    so if you switch the order, those would be your bounds where are you stuck?

    • 2 years ago
  7. Wislar Group Title
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    How would I break up the integral into iterated sections since the x is in e^(xy)?

    • 2 years ago
  8. TuringTest Group Title
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    \[\int_0^4\int_0^yy^2e^{yx}dxdy=\int_0^4y\left[\int_0^y ye^{yx}dx\right]dy\]

    • 2 years ago
  9. TuringTest Group Title
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    notice that\[\frac{\partial}{\partial x}e^{yx}=ye^{yx}\]

    • 2 years ago
  10. Wislar Group Title
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    Alright, so I would have.. \[\int\limits_{0}^{4}ydy*[e ^{xy}|0 \ \to\ y]?\]

    • 2 years ago
  11. TuringTest Group Title
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    yes

    • 2 years ago
  12. Wislar Group Title
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    Thank you!

    • 2 years ago
  13. TuringTest Group Title
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    welcome :D

    • 2 years ago
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