3.2函數導數的解析解

3.2.1函數的導數和高階導數java >> syms x; f(x)=sin(x)/(x^2+4*x+3); f1=diff(f) f1(x) = cos(x)/(x^2 + 4*x + 3) - (sin(x)*(2*x + 4))/(x^2 + 4*x + 3)^2 >> ezplot (f,[0,5]),hold on;ezplot(f1,[0,5]) >> f4=diff(f

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