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"Find the directional derivative fu(1,2)

The directional derivative of z = f(x,y) at (2,1) in the direction toward the point (1,3) is -2/sqrt(5), and the directional
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2. asked by Dani
3. 869 views
"Find the directional derivative fu(1,2) for the function f with u = (3i-4j)/5 for f(x,y)= x^(2) - y^(2)."Thank you!
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2. asked by Anonymous
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Find the gradient and directional derivative of f at P in the direction of v:f(x,y)=ln(x^2 + y^2 +1)+ e^(2xy) P(0,2) v=5i-12j
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2. asked by Sara
3. 2,310 views
3. If f(x, y)=5 − 4x3 + 8y2, find a unit vector ~u for which the directional derivativeD~uf(1, 1) is zero. im not sure how to
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2. asked by rebecca
3. 640 views
Find the directional derivative of f(x,y,z)=z3−x2yat the point (-2, 5, 1) in the direction of the vector
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2. asked by val
3. 108 views
Let f(x,y,z) = .Find the directional derivative of f(x,y,z) at the point (1,3,-2) in the direction of the vector [3,-1,4]
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2. asked by Moin Khan
3. 413 views
Find the directional derivative of:âˆ…=(x+2y+z)Â²â€”(xâ€”yâ€”z)Â² at the point (2, 1, -1) in the
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2. asked by ...
3. 431 views
Find the directional derivative of the function f(x,y,z) =z^2 -xy^2at the point P(2,1,3) in the direction of the vector v=< -1,
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2. asked by C
3. 853 views
Find the directional derivative of f(x, y, z) 5y x + z = at P(4,1,-3)in the direction from P to Q(3,2,-2). NOTE: Enter the exact
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2. asked by CarpoolBoi
3. 125 views
Find the directional derivative of f(x, y, z) 5y(x + z) = at P(4,1,-3)in the direction from P to Q(3,2,-2). NOTE: Enter the
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2. asked by CarpoolBoi
3. 121 views