graficas

1. >> k=0.5;
>> w=3;
>> t=linspace(0,20,300);
>> y=(8*exp(-k*t).*cos(w*t));
>> plot(t,y)
>> hold on
>> plot(t,zeros(length(t)))
>> grid on
>> [0,0.4] a [0,0.6]
problema 8.14
>> l=450;
e=50000;
I=30000;
w=1.75;
x=linspace(-1,450);
y=(w./120*e*I*l)*(-x.^5+2*l^2*x.^3-l^4*x);
plot(x,y)
hold on
plot(x,zeros(length(x)))
grid on
[0,0] a [0.1]
problema 8.16
>> t=linspace(0.01,20,200);
>> c=(70*exp(-1.5*t)+25*exp(-0.075*t)-9);
>> plot(t,c)
>> hold on
>> plot(t,zeros(length(t)))
>> grid on
[0,13.6] a [0,13.8]
problema 8.12
>> E=200000;
m=250;
Le=100;
x=linspace(0,10000000,200);
y=(m./(1+.2*Le./cos(0.5*sqrt(x/E))));
plot(x,y)
hold on
plot(x,zeros(length(x)))
grid on
este problema no sale
problema 8.15
>> x=linspace(-100000000,100000000,200);
y=5-(10-20*(exp(-.2*x)-exp(-0.75*x)));
plot(x,y)
x=linspace(-10000,10000,200);
y=(10-20*(exp(-.2*x)-exp(-0.75*x)));
plot(x,y)
hold on
plot(x,zeros(length(x)))
grid on
>>