1.

If X and Y are given as current co-ordinates, what is the equation of the tangent at a specific point of x3 – 3axy + y3 = 0 at (x, y)?

A. (x2 – ay)X + (y2 – ax)Y = -2axy
B. (x2 – ay)X + (y2 – ax)Y = 2axy
C. (x2 – ay)X + (y2 – ax)Y = axy
D. (x2 – ay)X + (y2 – ax)Y = -axy
Answer» D. (x2 – ay)X + (y2 – ax)Y = -axy


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