3 and 4 .Determinants and Matrices
normal

The value of the determinant $\left| {\,\begin{array}{*{20}{c}}1&2&3\\3&5&7\\8&{14}&{20}\end{array}\,} \right|$is

A

$20$

B

$10$

C

$0$

D

$250$

Solution

(c) $\left| {\,\begin{array}{*{20}{c}}1&2&3\\3&5&7\\8&{14}&{20}\end{array}\,} \right| = 2 – 8 + 6 = 0$.

Standard 12
Mathematics

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