If A = [ * 20 c 1&0&1 2&1&0 3&2&1 ],then A= - Vidyadip

MCQ

If $A = \left[ {\begin{array}{*{20}{c}}1&0&1\\2&1&0\\3&2&1\end{array}} \right],$then $\det A$=

✓
$2$
B
$3$
C
$4$
D
$5$

✓

Answer

Correct option: A.

$2$

a
(a) $|A| = \left| {\,\begin{array}{*{20}{c}}1&0&1\\2&1&0\\3&2&1\end{array}\,} \right|$ = $1(1 - 0) + 0 + 1(4 - 3)$ = $2.$

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