- #26

- 28

- 0

2xYou tell me, [itex]\delta_{ij}x_j[/itex] simplifies to [itex]x_i[/itex]...what about [itex](x_k x_k)^{n/2-1}[/itex]?...that looks like a power of [itex]r[/itex] to me

What does that give you for [itex]\mathbf{\nabla}r^n[/itex]?

_{i}e

_{i}r^n-1?