Matrices and Determinants 4 Question 17
18. The number of matrices whose entries are either or and for which the system
(2010)
(a) 0
(b)
(c) 168
(d) 2
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Answer:
Correct Answer: 18. (a)
Solution:
- Since,
= is linear equation in three variables and that could have only unique, no solution or infinitely many solution.
Hence, number of matrices