6. BI l & = (1, -2, 3)", 8 = (4, 3, -2)",1= (5, 3, -1)", :
(1) 2a - 8 + 3า
(2) 5 (a + 8) +5 (a+1) + (8 +1)-
7. EI it a1 = (1, -2, 2, -1)", 2 = (2, 3, -2, -3),43 = (1, -2, 3, -4)", H # 8
รัE 2(8 + a1) + 3(8 - 2a2) = 4a3 + 8, & 8.
8. EI & = (1, 2, 2, 3) , 8 = (2, -1, 3, 2)", :
(1) (a, B);
(2) |||, |||;
(3) a 582]3 %# 0;
(4) a 58 2lง EE d.
9. % a = (2, 3, 4)",8 = (3, -1, 5)",7 = (-1,2, 0)", %:
(1) (a, B)1 +B;
(2) (a,7) (8, 1);
(3) ( 1
8
|a||"
a - 8
||a - 8| "
(4) ๔
7) : 8.
-
10. Bl lg it a = (1,0, 1, 0)",8 = (1, -1, -2, 2)", #E lt 1, # ๆ 5 4,8 %y IE%.