a x1 x2 x3i h b a b a a1 a2 a3i h b b1 b2 b3i h a b a b a b R3 a b a b a i 2j k b 3i j 7k P 1 0 1 Q 2 4 5 R 3 1 7 P QR 4 1 h 1 0 i c 2 0 3 i h a 2 3 h b 2 i A 1 0 1 B 2 3 0 C AD AB AC 1 1 4 D 0 3 2 a b c a b c a b c a b c a b c a b c a b c b a a b 0 a b c 0 a b b a c a
View Full Document