+ax a c1+x2C2|a21x1+a2x2a22…a2n r,tanx an? C,+x2c a1x1+a12X+…+a1nxna1 2 CI+x,cn lax +ax +.+ax an1x1+an2x2+…+anx,a 2 2 a1 2 2 c + x c n n n n n n n a x a x a a a x a x a a a x a x a a        1 1 2 2 2 21 1 22 2 22 2 11 1 12 2 12 1 + + + 1 3 3  c + x c n n c + x c 1 n n n n n n n n n n n n n n a x a x a x a a a x a x a x a a a x a x a x a a           1 1 2 2 2 2 1 1 2 2 2 2 2 2 2 1 1 1 1 2 2 1 1 2 1 + + + + + + + + + 1 2 2 22 2 1 12 1 D b a a b a a b a a n n nn n n = =       