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hhhmortal
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Homework Statement
By computing ∇(1/r) show that
∫∇²(1/r).dV = -4Pi if the volume 'V' is a sphere containing the origin.
The Attempt at a Solution
∫∇²(1/r).dV = ∫∇(1/r).dS But I can't differentiate (1/r) since the sphere contains the origin. I am wondering if there's any other way to tackle this.
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