章绍辉数学建模第一章(共8页).doc

精选优质文档-倾情为你奉上习题一1.（1）Matlab命令：hold on;x1=linspace(-1,1);y11=sqrt(1-x1.2);y12=-sqrt(1-x1.2);plot(x1,y11);plot(x1,y12);x2=linspace(-2,2);y21=sqrt(4-x2.2);y22=-sqrt(4-x2.2);plot(x2,y21);plot(x2,y22);x3=linspace(-2,2);y31=sqrt(1-x3.2/4);y32=-sqrt(1-x3.2/4);plot(x3,y31);plot(x3,y32);输出图形：（2）Matlab命令：hold on;x1=linspace(-3,3);y1=exp(x1);plot(x1,y1,-);x2=linspace(-5,25);y2=x2;plot(x2,y2,-);x3=linspace(0.05,20);y3=log(x3);