題組內容

1.(4%)

(a) At any point (x0, y0, z0) in the domain of a scalar function V(x, y, z), we take a path ae along V= c, where c is a constant, or take a path an along ∇V. Tell me about the main characteristic(主要 特徴) of these two paths a: and an, and also what is61d52883e217b.jpg, the dot product of at and an?