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Draw a triangle demonstrating the horizontal motion to the proper along with the vertical motion (up or down).furnished the partial derivatives ∂ƒ/∂x and ∂ƒ/∂y of ƒ exist at a. Note that ∇ƒ(a) is usually a vectorHe expressed the gradient like we do in matrix using the sq. brackets thingy. So gradient is really a vector & a matrix?At