Find the volume betweem y=(1/X) and y=0 on the interval 1 to 2?

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2007-09-12 04:57:52 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

rotated around the x-axis

2007-09-12 04:58:29 · update #1

The volume V is given by the integral V = Integral (1 to 2) pi (1/x^2) dx = pi [-1/x] ( 1 to 2) = pi (-1/2 +1) = pi/2

2007-09-12 05:07:23 · answer #1 · answered by Steiner 7 · 0⤊ 0⤋

Find integ(pi*(1/x)^2)dx) from 1 to 2. You get 3*pi/4.

2007-09-12 12:04:30 · answer #2 · answered by Tony 7 · 0⤊ 0⤋