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1 June, 00:01

A solid lies between planes perpendicular to the x-axis at x = 0 and x = 17. The cross-sections perpendicular to the axis on the interval 0 ≤ x ≤ 17 are squares with diagonals that run from the parabola y = - 2 √x to the parabola y = 2 √x.

Find the volume of the solid.

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  1. 1 June, 03:53
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    Therefore, we get that the volume of the solid is V=8/3 · 17^{3/2}.

    Step-by-step explanation:

    From exercise we have that

    0 ≤ x ≤ 17

    y = - 2 √x and y = 2 √x.

    We calculate the volume of the solid, we get:

    /int/limits^17_0 / int/limits^{2 √x}_{-2 √x} {1} /, dy /, dx=

    =/int/limits^17_0 [y]/limits^{2 √x}_{-2 √x} /, dx

    =/int/limits^17_0 { (2 √x+2 √x) } /, dx

    =4/int/limits^17_0 {√x} /, dx

    =4 · 2/3 [x]/limits^17_0

    =8/3 · 17^{3/2}

    Therefore, we get that the volume of the solid is V=8/3 · 17^{3/2}.
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