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Math Help - Can somebody check if I did it right?

  1. #1
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    Can somebody check if I did it right?

    Can somebody check if I did it right?-daaa.pngHi, I am not very good at math and I think I solved this equation wrong ;/ Can you guys check it and help me?
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  2. #2
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    Re: Can somebody check if I did it right?

    One major error: the integral of \frac{dp}{2p} is NOT ln(2p) as you can see by differentiating. Instead write it as \frac{1}{2}\frac{dp}{p}. Integrating gives \frac{1}{2}ln|p|= ln|p^{1/2}|+ C.

    Personally, from \frac{dp}{dx}= \frac{2p}{x}, I would have left the "2" where it is: \frac{dp}{p}= 2\frac{dx}{x}. Integrating both sides, ln|p|= 2ln|x|+ C so that p= cx^2 (I have dropped the absolute values because "c" can be positive or negative itself).
    Thanks from darjiaus7
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  3. #3
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    Re: Can somebody check if I did it right?

    Thank you very much. So that was only 1 error? Everything else is good? I corrected this mistake - Can somebody check if I did it right?-pataisytas.png
    I need this to be 100% correct , because i need to get 10 from Homework and I will have a right to not write math exam witch is very hard
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  4. #4
    Forum Admin topsquark's Avatar
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    Re: Can somebody check if I did it right?

    We cannot solve your homework problems for you. I realize you have been showing your work and all (that's a good thing!), but we cannot allow this in general. Please do not do this again.

    For anyone helping please only give broad help, not specifics.

    -Dan
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  5. #5
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    Re: Can somebody check if I did it right?

    I don't ask to solve my homework problems for me I ask to check if I did it right. I don't need you to even correct it . I can do it myself . I just need to know if i did it right
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