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Asked by Kumkum

Show that volume of the solid generated by revolving y=1/x between x=1,2x=infinity about x-axis
8 years ago

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Answered by Steve
by x=1,2 do you mean 1.2 or 6/5?

Anyway, the volume from x=a to ∞ is

∫[a,∞] πy^2 dx
= ∫[a,∞] π/x^2 dx = π/a
8 years ago
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