将D,代入上式左端得 左端=a,1(b,A1+b2A21+…+bnA1) +a2(bA12+b2A22+·+bnA,2) ain(bAin+B242n++B4m) = b (anA+a242+...+amAin) ☒无法显示该片。···” +b(aA1+a2A2+…+anAn) +b(a1A1+a2A2++amAm） =bD 上页 将 Dj 代入上式左端得 1 1 11 2 21 1 2 1 12 2 22 2 1 1 2 2 1 1 11 2 12 1 1 2 2 1 1 2 2 ( ) ( ) ( ) ( ) ( ) ( ) i n n i n n in n n n nn i i in n i ii i i i in in n i n i n in nn i a b A b A b A a b A b A b A a b A b A b A b a A a A a A b a A a A a A b a A a A a A b = + + + + + + + + + + + + = + + + + + + + + + + + + + = 左端 D