求导数y’
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求导数y’求导数y’ 求导数y’sec^2(x-y)*(x-y)''=[y''(1+x^2)-y(1+x^2)'']/(1+x^2)^2sec^2(x-y)-y''sec^2(x-y)=y''/(1+
求导数y’
求导数y’
求导数y’
sec^2 (x-y) *(x-y)'= [y'(1+x^2)-y(1+x^2)' ]/(1+x^2)^2
sec^2 (x-y) -y' sec^2 (x-y) =y'/(1+x^2) -2xy/(1+x^2)^2
y'/(1+x^2)+y' sec^2 (x-y) =sec^2 (x-y)+2xy/(1+x^2)^2
y'= [ sec^2 (x-y)+2xy/(1+x^2)^2 ] / [1/(1+x^2) +sec^2(x-y)] 下面请自行化简