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3 and 4 .Determinants and Matrices
easy
જો $\left| {\,\begin{array}{*{20}{c}}1&k&3\\3&k&{ - 2}\\2&3&{ - 1}\end{array}\,} \right| = 0$,તો $k$ ની કિમત મેળવો.
A
$-1$
B
$0$
C
$1$
D
એકપણ નહી.
(IIT-1979)
Solution
(d) $\left| {\,\begin{array}{*{20}{c}}1&k&3\\3&k&{ – 2}\\2&3&{ – 1}\end{array}\,} \right|\, = \,0 \Rightarrow k = \frac{{33}}{8}$.
Standard 12
Mathematics