anhuihbo

（1）y=1/x：n=0:10:1000;y=1./n;plot(n,y)gridon（2）y=x*x：n=-1000:10:1000;y=n.*n;plot(n,y)gridon（3）x=0:1:1000;y=0.065*x+(102*x)+(7154*100./(x+100));plot(x,y)gridon（4）symsxy=x^2;ezplot(y,[0,100])gridon（5）分段函数x=-3:0.01:3;y1=zeros(size(x));y2=