Multivariable Calculus 9 | Geometric Picture for the Gradient [dark version]

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This video is about the geometric picture of the gradient. It's perpendicular to contour lines.

#MultivariableCalculus
#Analysis
#Integral
#Calculus
#Derivatives
#Mathematicspdt
#Lagrange

(This explanation fits to lectures for students in their first year of study: Mathematics for physicists, Mathematics for the natural science, Mathematics for engineers and so on)