`x^3 + y^3 = 6xy - 1, (2,3)` Find `dy/dx` by implicit differentiation and evaluate the derivative at the given point.

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Chapter 2, 2.5 - Problem 26 - Calculus of a Single Variable (10th Edition, Ron Larson).
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mathace | (Level 3) Assistant Educator

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Given: `x^3+y^3=6xy-1,(2,3)`







Evaluate the derivative by substituting the (2, 3) into the derivative.


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gsarora17 | (Level 2) Associate Educator

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Differentiating both sides with respect to x,






Now derivative at the point (2,3) can be obtained by plugging in the values of x and y in the dy/dx.

Derivative at (2,3)=`(2*3-2^2)/(3^2-2*2) = 2/5`

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