性质2（提公因子，或称作乘以常数：(kr i)或(kc i)）若(D 1=egin{vmatrix} vdots &vdots &vdots &vdotska {i1}& ka {i2} &cdots &ka {in} vdots &vdots &vdots &vdotsend{vmatrix},;D=egin{vmatrix} vdots &vdots &vdots &vdotsa {i1}&a {i2} &cdots &a {in} vdots &vdots &vdots &vdotsend{vmatrix})，则(D 1=kD).