GATE 2016 Textile Engineering Question 27: Laplacian of 1/√(x²+y²+z²)

Textile Engineering > GATE 2016 > Calculus

Let f(x,y,z) = 1/√(x² + y² + z²). The value of (∂²f/∂x²) + (∂²f/∂y²) + (∂²f/∂z²) is equal to

Correct : -0.01: 0.01