I am trying to solve the following problem and my answer does not match up with that in the book.I have done it 4 times and have got it wrong each time.
Can somebody do it before it drives me mad.
Find dy/dx as a function of x and y for y=x-y+2y^3-3Lnx
differentiate both sides;
The answer in my book is dy/dx=(x-3)/[3x(1+2y^2)]
I have followed the examples in the book fine, -this one is driving me mad.