Question

Define directional derivatives.​

Answer 1

Answer:

The directional derivative is the rate at which the function changes at a point in the direction . It is a vector form of the usual derivative, and can be defined as. (1) (2)

Answer 2

Answer:The directional derivative is the rate at which the function changes at a point in the direction . It is a vector form of the usual derivative, and can be defined as. (1) (2)

Step-by-step explanation: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).

please mark as brainliest