Find f_x, f_y, f_xx, f_xy, and f_yy, where f(x, y) = (4xy)/(1 - x).


Find {eq}f_x, \; f_y, \; f_{xx}, \; f_{xy}, {/eq} and {eq}f_{yy}, {/eq} where {eq}f(x, y) = \frac{4xy}{1 - x} {/eq}.


Derivative of the function can be found by differentiating the function. It tells about the steepness of the curve at a point. If the value of the slope is 0 it means tangent is horizontal.

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Point of Tangency: Definition & Example

from GMAT Prep: Help and Review

Chapter 14 / Lesson 15

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