Q. The set of equations
๐ฅ + ๐ฆ + ๐ง = 1
๐๐ฅ โ ๐๐ฆ + 3๐ง = 5
5๐ฅ โ 3๐ฆ + ๐๐ง = 6
has infinite solutions, if a =
| (A) โ3 | (B) 3 | (C) 4 | (D) โ4 |
Sol:
ฯ(A)=ฯ(AB)< no.of variables
|A|=0
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