7. What is the slope of the tangent line to the curve x3 + y3 – 3xy = 13 at the point (2,-1)?
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A. –5 |
B. -4 |
C. –1/5 |
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D. 4 |
E. 5 |
Solution: The answer is E
Use the method of implicit differentiation to solve for dy/dx and then evaluate at the point (2, -1).
At the point (2,-1), the slope of the tangent line to the given curve is,
