Find the equation of the tangent line to the curve at .
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(b) Determine an equation of the line tangent to the curve r4 - xy + y = 1 at the point (-1,1). Answer:
(d) Find the equation for the tangent line to the curve x²y + xy2 = 2 at (1,1). Answer
(f) If y = ry++1, find the equation of the tangent line to this curve at the point (-1,1). Answer: