MATLAB求隱函數所確定的函數的導數或偏導
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操作方法
(01)>> syms x y;>> df_dx=diff(cos(x+sin(y))-sin(y),x)df_dx =-sin(x + sin(y))>> df_dy=diff(cos(x+sin(y))-sin(y),y)df_dy =- cos(y) - sin(x + sin(y))*cos(y)>> dy_dx=-df_dx/df_dydy_dx =-sin(x + sin(y))/(cos(y) + sin(x + sin(y))*cos(y))
(02)>> pretty(dy_dx)sin(x + sin(y))- -------------------------------cos(y) + sin(x + sin(y)) cos(y)
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