close all;
clear all;

s=tf('s');

G=1/(s^2+7*s+10);

hold on;
k=[0;1;9/4; 4; 10; 50; 490];

for i=1:7 
G1=k(i)*G/(1+k(i)*G);

step(G1);

end

figure (2);
rlocus(G);