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3 and 4 .Determinants and Matrices
medium
જો સમીકરણની સંહતિ $3x - 2y + z = 0$, $\lambda x - 14y + 15z = 0$, $x + 2y + 3z = 0$ ને શૂન્યતર ઉકેલ હોય, તો $\lambda $ ની કિમત મેળવો.
A
$5$
B
$-5$
C
$-29$
D
$29$
Solution
(d) If the given system of equations has a non-trivial solution, then $\left| {\,\begin{array}{*{20}{c}}3&{ – 2}&1\\\lambda &{ – 14}&{15}\\1&2&3\end{array}\,} \right| = 0 \Rightarrow \lambda = 29$.
Standard 12
Mathematics