Solving task on-line

Given function u = f(x,y,z); point A(x₀;y₀) and vector a(a₁;a₂).
To find:
а) grad u in point А.
б) Derivative at point A in the direction of the vector a
u = x² + 2xy + y² + z²
A(1;1;1)
a(2;-1;0)
Gradient grad u

How to find the derivative

grad u in point А

Module grad u


The vector а(2;-1;0)
Runners angles

The vectors Module |a|



Derivative at point A in the direction of the vector а