Class 12Mathematics3 and 4 .Determinants and MatricesExpansion of determinants, Solution of equation in the form of determinants and area of triangle and Equation of Line
EasyIf $\left|\begin{array}{ll}3 & x \\ x & 1\end{array}\right|=\left|\begin{array}{ll}3 & 2 \\ 4 & 1\end{array}\right|$,then the value of $x$ is . . . . . . .
- A$\pm 1$
- B$\pm 2$
- C$2$
- D$\pm 2\sqrt{2}$
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Find the equation of the line joining $(3, 1)$ and $(9, 3)$ using determinants.
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