Question: Let F(x, y, z) = f(r)r, where r ||r|| = x2 + y2 z2) and f is a differentiable scalar function (except possibly at

Let F(x, y, z) = f(r)r, where r ||r|| = √x2 + y2 ÷ z2) and f is a differentiable scalar function (except possibly at r = 0). Show that curl F = 0 (except at r = 0).

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