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Gina

  • 5 years ago

find the general solution of the equation,,,y'+2y=cosx

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  1. anonymous
    • 5 years ago
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    Oh dang...i got to brush up on differential equations...um...what did you guys recently learn? What methods?

  2. anonymous
    • 5 years ago
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    it's the same as the other one i told you, linear first order

  3. Gina
    • 5 years ago
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    just show me your answer just wanna be sure

  4. anonymous
    • 5 years ago
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    well, you can always differentiate and plug it back into the original to check if you want with something simple like this, but anyhow, http://www.wolframalpha.com/input/?i=y%27%2B2y%3Dcosx wolfram will make life so much easier

  5. Gina
    • 5 years ago
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    \[(x primey -y)arctgy divx =x; y \x=1=0\]

  6. Gina
    • 5 years ago
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    \[spaceknight i got a diferent answre and my answer \in the book is ,,,,x^2 +y^2=lncx ^{2}\]

  7. anonymous
    • 5 years ago
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    wolfram doesn't lie so either your book is wrong or you're looking at the wrong answer

  8. Gina
    • 5 years ago
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    \[y'=10^{x+y}\]

  9. Gina
    • 5 years ago
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    thanx can i also solve physics on that site?

  10. anonymous
    • 5 years ago
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    Gina, did you manage to solve this..... also what is the answer in your book?

  11. Gina
    • 5 years ago
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    my answer is x^2+y^2=\[\ln cx ^{x}\]

  12. Gina
    • 5 years ago
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    but did not manage it(

  13. anonymous
    • 5 years ago
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    This is my answer\[y=2/5*\cos(x)+1/5*\sin(x)+c\]

  14. Gina
    • 5 years ago
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    \[but how from this ,,,y'=10^{x+y}??\]

  15. anonymous
    • 5 years ago
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    nadeem you forgot to divide the e^2x into the constant, but rest is right.

  16. anonymous
    • 5 years ago
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    sorry typo this would be it: \[y=2/5∗\cos(x)+1/5∗\sin(x)+ce^{2x}\]

  17. anonymous
    • 5 years ago
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    Thanks for the reminder spaceknight

  18. anonymous
    • 5 years ago
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    Solve the differential equation using an integrating factor, which is 2 in your case

  19. anonymous
    • 5 years ago
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    not 2 but e^2x

  20. Gina
    • 5 years ago
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    help with physics ,,,,the space between the plates of a plane capacitor filled with mica (e = 7). area of the capacitor plates is 50cm ^ 2. determine the surface density of bound charges on mica, if the capacitor plates attract each other with a force

  21. Gina
    • 5 years ago
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    \[\int\limits_{?}^{?} dx \div cosx \times \sin ^{3}x\]

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