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math

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Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis.
y=1/x^2 y=0 x=4 x=7;
about y=–3

i integrated and plugged in values for x and got .61 *pi this is not the right answer been trying for hours please help!

  • math -

    You're close, perhaps it's a matter of numerical errors.
    Can you show your work?
    Did you start with:
    A=2π∫4:7∫0:1/x²[3+y] dy dx
    I got 0.6471π

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