3 and 4 .Determinants and Matrices
easy

સમીકરણની સંહતિ $2x + 3y + 4z = 9$,$4x + 9y + 3z = 10,$$5x + 10y + 5z = 11$તો $x$ ની કિમત મેળવો.

A

$\left| {\,\begin{array}{*{20}{c}}9&3&4\\{10}&9&3\\{11}&{10}&5\end{array}\,} \right| \div \left| {\,\begin{array}{*{20}{c}}2&3&4\\4&9&3\\5&{10}&5\end{array}\,} \right|$

B

$\left| {\,\begin{array}{*{20}{c}}9&4&3\\{10}&3&9\\{11}&5&{10}\end{array}\,} \right| \div \left| {\,\begin{array}{*{20}{c}}2&3&4\\4&9&3\\5&{10}&5\end{array}\,} \right|$

C

$\left| {\,\begin{array}{*{20}{c}}9&4&9\\{10}&3&3\\{11}&5&{10}\end{array}\,} \right| \div \left| {\,\begin{array}{*{20}{c}}3&2&4\\9&4&3\\{10}&5&5\end{array}\,} \right|$

D

એકપણ નહી.

Solution

(a) By Cramer’s Rule, $x = \frac{{{D_1}}}{D}$,
$\therefore (a) $ is the correct option.

Standard 12
Mathematics

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