1.

Conside the matrices A=[(1,2,3),(4,1,2),(1,-1,1)] B=[(2,1,3),(4,1,-1), (2,2,3)] C=[(14),(12),(2)] D=[(13),(11),(14)]. Now x=[(x),(y),(z)]is such that solutions of equation AX=C and BX=D represent two pointsL andM respectively in 3 dimensional space. If L' and M' are hre reflections of L and M in the plane x+y+z=9 then find coordinates of L,M,L',M'

Answer»

(3, 4, 2)
(5, 3, 4)
(7, 2, 3)
(1, 5, 6)

ANSWER :A


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