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3 and 4 .Determinants and Matrices
medium
સમીકરણની સંહતિ $x + y + z = 2$, $2x + y - z = 3,$ $3x + 2y + kz = 4$ એ એકાકી ઉકેલ હોય તો . . . .
A
$k \ne 0$
B
$ - 1 < k < 1$
C
$ - 2 < k < 2$
D
$k = 0$
Solution
(a) The given system of equations has a unique solution if $\left| {\,\begin{array}{*{20}{c}}1&1&1\\2&1&{ – 1}\\3&2&k\end{array}\,} \right| \ne 0 \Rightarrow k \ne 0$.
Standard 12
Mathematics