matlab上机考试

第4题syms x ya41=expand((2*x+3)^3-4)a42=expand(tan(2*x+y))a43=expand(cos(x-2*y))结果：a41 = 8*x^3 + 36*x^2 + 54*x + 23a42 = (tan(y) - (2*tan(x))/(tan(x)^2 - 1))/((2*tan(x)*tan(y))/(tan(x)^2 - 1) + 1)a43 = cos(x)*cos(y)^2 + 2*sin(x)*cos(y)*sin(y) - cos(x)*sin(y)^2第5题syms x y z n uf=1/y^2+x^n;g=-sin(y)*exp(u);a51=compose(f,g,x,z)a52=compose(f,g,y,z)a53=compose(f,g,n,z)a54=compose(f,g,x,y,z)a55=compose(f,g,n,u,z)结果：a51 = 1/y^2 + (-exp(u)*sin(z))^na52 = x^n + 1/(exp(2*u)*sin(z)^2)a53 = 1/y^2 + 1/x^(exp(u)*sin(z))a54 = 1/y^2 + (-exp(u)*sin(z))^na55 = 1/x^(exp(z)*sin(y)) + 1/y^2

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