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单词 stationary point
释义

stationary point

(in two variables) (x,y) is a stationary point of a function f(x,y) if the surface z = f(x,y) has a horizontal tangent plane above (x,y). Equivalently, if ∂f/∂x = 0 and ∂f/∂y = 0. Now let

If rt>s2 and r<0, the stationary point is a local maximum; if rt>s2 and r>0, the stationary point is a local minimum; if rt

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更新时间:2025/5/20 7:37:55