各位帮主请看看求解求解

你好同学，代码供参考：

% 1(1)
figure(1);clf
x = linspace(0,2*pi,101);
y = (0.5+3*sin(x)./(1+x.^2)).*cos(x);
plot(x,y)
% 1(2)
figure(2);clf
y = @(x)(x<=0).*(x+sqrt(pi))/exp(1)^2+(x>0).*...
    log(x+sqrt(1+x.^2))/2;
fplot(y, [-5,5])
% 1(3)
figure(3);clf
theta = linspace(0,2*pi,201);
rho = 10*sin(1+5*theta);
polarplot(theta,rho)

有帮助还请题主给个采纳支持一下答主答题哟，谢谢啦（づ￣3￣）づ╭❤～