- #1

Sudip Maity

- 1

- 0

## Homework Statement

prove grad(f/g)=((g grad f)-(f grad g))/g^2,if g not equal to 0.

## Homework Equations

no idea.

## The Attempt at a Solution

rhs will be grad f -(f grad g)/g^2.

can't make out what 2 do after that.referred other books but no help.it's a very obscure identity.found this in m.r.spiegel's vector analysis no.57 pg-78,chap GDC.