Question: Calculate 2 f by Eq. (3). Check by direct differentiation. Indicate when (3) is simpler. Show the details of your work. f = 1/(x

Calculate ∇2f by Eq. (3). Check by direct differentiation. Indicate when (3) is simpler. Show the details of your work.

f = 1/(x2 + y2 + z2)

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