Find , when:
If y log x = (x — y), prove that 
.
Let us differentiate the whole equation w.r.t x
Formula : 
According to product rule of differentiation
Therefore ,
(Multiply by 1+log x on both sides)
(y log x = x - y)
1
Find , when:
If y log x = (x — y), prove that .
Let us differentiate the whole equation w.r.t x
Formula :
According to product rule of differentiation
Therefore ,
(Multiply by 1+log x on both sides)
(y log x = x - y)