作业

>> x=[2 4]; >> y=x.^3+[(x-0.98).^2]/(x+1.25).^3-5*[(x+1)/x] y = 1.5613 57.5613 >> cosd(60)-[9-2.^(1/2)].^(1/3) ans = -1.4649 >> a=3;A=4;b=a.^2; B=b.^2-1; c = a + A - 2*B; C = a + B + 2*c C = -223