Determine if the following set is linearly independent or linerly dependent.

v_1=[1;2;1;-2] v_2=[2;1;-3;-1] v_3=[1;2;6;-5]

so I create the matrix http://img408.imageshack.us/img408/8518/onec.jpg and the rref of that is http://img683.imageshack.us/img683/4774/twok.jpg

so the last row of 0s confuses me. This means that the vectors are linearally dependent right?