zad3.

a = [3 1 1];
b = [1 5 1];
conv(a,b)

c = [2 5 8 0];
d = [4 1 2 7];
conv(c,d)

e = [0 0 2 1 4 0 0];
f = [0 0 1 5 2 0 0];
conv(e,f)

g = [1 9 2 2 1];
h = [0 0 2 6];
conv(g,h)

x = [-1 1 4 1];
q = [1 -3 3];
conv(x,q)

y = [9 9 2 2];
z = [0 5 1 0];
conv(y,z)

zad4.

a = [0 0 2 1 4 0 0];
b = [0 0 1 5 2 0 0];
rozm=size(a,2)+size(b,2)-1;
c = zeros(1,rozm);
for i=1:size(a,2)
    for j=1:size(b,2)
        c(i+j-1)=c(i+j-1)+a(i)*b(j);
        
    end
end
c

zad7.



zad8.




zad9.