If | ll 3 & 3 x & 1 |= | cc -3 & x 1 & 1 | then value of x is :

Question

If $\left|\begin{array}{ll}3 & 3 \\ x & 1\end{array}\right|=\left|\begin{array}{cc}-3 & x \\ 1 & 1\end{array}\right|$ then value of $x$ is :

✓

Answer

(B)$\quad\left|\begin{array}{ll}3 & 3 \\ x & 1\end{array}\right|=\left|\begin{array}{cc}-3 & x \\ 1 & 1\end{array}\right|$
$
\begin{aligned}
\Rightarrow & & 3-3 x & =-3-x \\
\Rightarrow & & 3+3 & =3 x-x \\
\Rightarrow & & 6 & =2 x \Rightarrow x=3
\end{aligned}
$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Determinants→Determinants — all question types→MATHS STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

If function $f$ is defined such that
$
f(x)=\left\{\begin{array}{cc}
\frac{k \cos x}{\pi-2 x}, & \text { if } x \neq \frac{\pi}{2} \\
3, & \text { if } x=\frac{\pi}{2}
\end{array}\right.
$is continuous at $x=\frac{\pi}{2}$, then value of $k$ :

→

If $f(x)=\sqrt{1+\cos ^2\left(x^2\right)}$, then the value of $f^{\prime}\left(\frac{\sqrt{\pi}}{2}\right)$ is

→

The least value of the function $f(x)=2 \cos x+x$ in the closed interval $\left[0, \frac{\pi}{2}\right]$ is

→

Which of the following statements is correct?

Every LPP admits an optimal solution
A LPP admits unique optimal solution
If a LPP admits two optimal solution it has an infinite number of optimal solutions
The set of all feasible solutions of a LPP is not a converse set

→

Speed equation of a particle is $S =t^2-4 t+5$, Find the time having zero speed.

→

The function $f : R \rightarrow R$ defined by $f(x) = 2^x + 2^{|x|}$ is:

→

What is the sum of the squares ofdirection cosines of the line joining thepoints (1, 2, -3) and (-2, 3, 1):

→

Three persons, A, B and C fine a target in turn starting with A. Their probability of hitting the target are 0.4, 0.2 and 0.2, respectively. The probability of two hits is

→

Let $T$ be the set of all triangles in the Euclidean plane, and let a relation $R$ on $T$ be defined as $a R b$ if $a$ is congruent to $b \forall a, b \in T$. Then $R$ is

→

The area bounded by the curve $y^{2 }= x,$ line $y = 4$ and $y-$axis is$:$