If V and W are vector fields on R3 and f is a function on R3, show that: ∇ · (fV) = f(∇ · V) + (∇f) · V
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If V and W are vector fields on R3 and f is a function on R3, show that:
∇ · (fV) = f(∇ · V) + (∇f) · V
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