三、行列式乘法法则设有两个n级行列式hM:aiMana12·...aD, =D2::b.b.5annanan2nl12C1C12Cin..CnmCo?则·D,D, =:.CnCn2Cnn.其中 c, =a,tbi, +a,zba, +.+ainbw.hink=1i,j=1,2,..",n2.8Laplace定理§2.8 Laplace定理 三、行列式乘法法则 设有两个n 级行列式 11 12 1 11 12 1 21 22 2 21 22 2 1 2 1 2 1 2 , n n n n n n nn n n nn a a a b b b a a a b b b D D a a a b b b = = 其中 ij i j i j in nj 1 1 2 2 c a b a b a b = + + + 11 12 1 21 22 2 1 2 1 2 n n n n nn c c c c c c D D c c c 则 = 1 , n ik kj k a b = =  i j n , 1,2, , =