A) \[\infty \]
B) \[1\]
C) \[2\]
D) \[0\]
Correct Answer: B
Solution :
Given system of equations are \[x-y+z=2\] \[2x+y-z=5\] and \[4x+y+z=10\] Now, \[A=\left| \begin{matrix} 1 & -1 & 1 \\ 2 & 1 & -1 \\ 4 & 1 & 1 \\ \end{matrix} \right|\] \[=1(1+1)+1(2+4)+1(2-4)\] \[=2+6-2\] \[=6\ne 0\] Hence, it has unique solution.bYou need to login to perform this action.
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