Question

The temperature T in degrees Celsius varies with position (x,y), in centimeters, on the surface of a flat metal plate. Let T=x^3-3xy^2. Determine the direction and magnitude of the maximum decrease of temperature at the point (1, 0.5).

Answer 1

Answer:To find the directional derivative in the direction of the vector (1,2), we need to find a unit vector in the direction of the vector (1,2). We simply divide by the magnitude of (1,2). u=(1,2)∥(1,2)∥=(1,2)√12+22=(1,2)√5=(1/√5,2/√5).

Explanation:

Answer 2

To find the directional derivative in the direction of the vector (1,2), we need to find a unit vector in the direction of the vector (1,2). We simply divide by the magnitude of (1,2). u=(1,2)∥(1,2)∥=(1,2)√12+22=(1,2)√5=(1/√5,2/√5).