The directional derivative of z = f(x, y) at (2, 1) inthe direction toward the point (1
Chapter 14, Problem 76(choose chapter or problem)
The directional derivative of z = f(x, y) at (2, 1) inthe direction toward the point (1, 3) is 2/5, and thedirectional derivative in the direction toward the point(5, 5) is 1. Compute z/x and z/y at (2, 1).
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