math1

แบบทดสอบ1. ถา้ 3 x 2 y  = 3 1 5 จงหา x, y, z    2 4 1   2 4 z    ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ...............................................................................................................................................................2. ถ้า x y 5 = 3 5 จงหา x, y    4 1   4 x  y    ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ................................................................................................................................................................ ...............................................................................................................................................................3. กำหนดให้ A= 1 2 , B= 2  1 , c= 2 1 จงหำ  3     0   1  0 1   3 3.1 A + B ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ 3.2 B+A ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ 3.3 C+A ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................

3.4 C-B ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ 3.5 (A-B)+C ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................4. 2 1 + 1 2 + X = 0  1 จงหาเมทริกซ์ X  1 3    0 4   1 2    ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ...................................................................................................................................................... ........................................................................................................................................................5. 2A + X = B – 2X เมื่อ A= 1 0 และ B= 5  3  2   6  3   2 ................................................................................................................................................................ ................................................................................................................................................................ ........................................................................................................................................ ...................... ................................................................................................................................................................ ................................................................................................................................................................6. กาหนด A= 2 1 และ B= 1 2 จงหา  0  3  1  1 6.1 ( A – B ) ( A + B ) ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ...................................................................................................................................................... 6.2 A2 + 2 A B + B2 ................................................................................................................................................................ ................................................................................................................................................................ ........................................................................................................................................ ...................... ..............................................................................................................................................................