Find the slope of the tangent line at the indicated point.
(a) Witch of Agnessi
(x^2 + 4)y = 8
Point: (2, 1)
(x^2 + y^2)^2 = 4(x^2)y
Please see the attached file.
There is a very good reference on implicit differentiation:
The solution provides a theoretical explanation and then a very detailed and step-by-step work-out for the problem.