How do you implicitly differentiate #xy^2 + xy = 12#?
1 Answer
Dec 24, 2015
Explanation:
Given
We can differentiate with respect to
This can be done by product rule like this
#=> y^2 + 2xy dy/dx + y + x(dy/dx) = 0 #
Keep all
#2xy (dy/dx) + x (dy/dx) = -y^2 -y#
Factor out
#dy/dx(2xy +x) = -y^2 -y#
Divide both side by
#(dy/dx)(2xy +x)/(2xy+x )=( -y^2 -y)/(2xy+x)#
#dy/dx = (-y^2 -y)/(2xy+x) = (-y(y+1))/(x(2y+1))#