Tìm y(n) =x(n)*h(n) biết. x(n) = { 2, 1, 4}; h(n) = {2, 1, 5}

y(n) ={4, 4, 19, 9, 20}

y(n) ={4, 4, 9, 19, 20}

y(n) ={ 9, 4, 19, 20}

y(n) ={0, 4, 19, 20, 0}