NOT INT GRAL

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PRIMER 2.1
clc 
clear
n = 30000;
aint = 2.71;
bint = 50;
deltax = (bint - aint)/n;
suma = 0;
for i = 1:n+1 
x(i) = aint+(i-1)*deltax;
f(i) = 1/(x(i)*(log(x(i)))^2);
suma = suma + f(i)*deltax;
integrals(i) = suma;
integrale(i)= (-1/log(x(i)))+1;
end
plot(x,integrals,'k.')
plot(x,integrale,'g')
xlabel("x", "fontsize",3)
ylabel("F(x)", "fontsize",3)
2.2 
clc 
clear
n = 30000;
aint = 0;
bint = 100;
deltax = (bint - aint)/n;
suma = 0;
for i = 1:n+1 
x(i) = aint+(i-1)*deltax;
f(i) = (x(i)-1)*(exp(-(x(i))));
suma = suma + f(i)*deltax;
integrals(i) = suma;
integrale(i)= (-exp(-x(i)))*(x(i));
end
plot(x,integrals,'b')
plot(x,integrale,'g')
xlabel("x", "fontsize",3)
ylabel("F(x)", "fontsize",3) 
2.3
2.4
clc 
clear
n = 30000;
aint = 0;
bint = 100;
deltax = (bint - aint)/n;
suma = 0;
for i = 1:n+1 
x(i) = aint+(i-1)*deltax;
f(i) = (x(i)^2)/(exp(x(i)^3));
suma = suma + f(i)*deltax;
integrals(i) = suma;
integrale(i)= (-1/3)*(exp(-x(i)^3))+0.33333;
end
plot(x,integrals,'b.')
plot(x,integrale,'g')
xlabel("x", "fontsize",3)
ylabel("F(x)", "fontsize",3)