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Math Help - surface area, y=sqrt(2x)

  1. #1
    n0x
    n0x is offline
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    Exclamation surface area, y=sqrt(2x)

    Hello, first time posting on this forum, but definitely not the first time I've followed it. I was hoping someone could help me with this surface area problem:

    Find the area of the surface obtained by rotating the curve y=sqrt(2x) about the x-axis from x=0 to x=5. sqrt meaning square root obviously.

    from my own troubled math, I'm coming up with a wrong answer of

    (2/3)*pi*(2x)^ (3/2) = 66.2306

    sorry for the bad character illustration, thats supposed to be 2x to the 3/2 power.

    I believe my source of error is in the beginning because I do not think I am getting out of the initial Surface Area square root formula properly.
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  2. #2
    MHF Contributor

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    It would help if you would show HOW you got that result.
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