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## Main Question or Discussion Point

Hi everyone, nice to meet u all, this is my first post here.

I have thought of the geometric meaning of grad f for a long time, but i still can't understand what it means on the 3D/2D geometry.

Is it meaning the vector perpendicular to the curve at any point ?

thx all.

I have thought of the geometric meaning of grad f for a long time, but i still can't understand what it means on the 3D/2D geometry.

Is it meaning the vector perpendicular to the curve at any point ?

thx all.