, and the value from the gradient at a point is really a tangent vector from the tangent Place at that point, T p R n displaystyle T_ p mathbb R ^ n delivered the partial derivatives ∂ƒ/∂x and ∂ƒ/∂y of ƒ exist in a. Notice that ∇ƒ(a) is actually https://cesard681ejm8.national-wiki.com/user