Find the equations for the lines tangent to the graph of xy


Question: 1. Find the slope of the curve x2 + 3y2 = 7 at (2, -1).

2. Assume y is a differentiable function of x and that y+sin y+x2 = 9. Find dy/dx at the point x = 3, y = 0.

3. Find the equations for the lines tangent to the graph of xy + y2 = 4 where x = 3.

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Mathematics: Find the equations for the lines tangent to the graph of xy
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