... (AAT)–1 = 1 /3 001 /3 ⎡⎤⎢⎥⎣⎦⇒ P = I – AT(AAT)–1A = 1 /3 0 1 /3 1 /3 0 1 /3 1 /3 1 /3 1 /3 1 /3 2 /3 01 /3 1 /3 0 2 /3 −⎡⎤⎢⎥−−⎢⎥⎢⎥−−⎢⎥−⎣⎦ ⇒ Pc = 1 /3 2 /3 1 1 /3 −⎡⎤⎢⎥−⎢⎥⎢⎥⎢⎥⎣⎦ ... (0,0,0,1) (4,6,–10, 34 ) (2565/1156, –5 13/ 1156, –5 13/ 289,0) (0,0,0,0) 5 /34 68/279 (10/17, 15/17, 9/17,0) (35 /31 , 24 /31 ,3/ 31,0) Phương pháp gradient rút gọn trên đây là do Wolfe ... x2, x 3 )∈ R 3 : x1 + x2 = 3, x1 + x2 + x 3 ≤ 6}, b. S = {x = (x1, x2, x 3 )∈ R 3 : x12+ x22 + x 3 2 ≤ 4, x1 + x2 =1}. Bài 2. Cho S = {x = (x1, x2, x 3 )∈ R 3 :...