Download App

STD 12 - 3 and 4 . determinant and metrices — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 3 and 4 . determinant and metrices4 Marks
MCQ
If $U = [2\, - 3\,\,4],X = [0\,\,2\,\,3], V = \left[ \begin{array}{l}3\\2\\1\end{array} \right]$ and $Y = \left[ \begin{array}{l}2\\2\\4\end{array} \right]$, then $UV + XY=$
  • A
    $20$
  • B
    $[-20]$
  • C
    $- 20$
  • ✓
    $[20]$
✓

Answer

Correct option: D.
$[20]$
$UV = [4]$ and $XY = [16];$
$\therefore UV + XY = [20]$.

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

JEE STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Let $[\mathrm{x}]$ denote the greatest integer less than or equal to $\mathrm{x}$. Then, the values of $x \in R$ satisfying the equation $\left[e^{x}\right]^{2}+\left[e^{x}+1\right]-3=0$ lie in the interval:
→
Let $f : R \to R$ be a function such that $f(2 - x)\, = f(2 + x)$ and $f(4 -x)\, = f(4 + x)$, for all $x \in  R$ and $\int\limits_0^2 {f\left( x \right)\,dx = 5} $ . Then the value of $\int\limits_{10}^{50} {f\left( x \right)\,\,dx} $ is
→
The sum, of the squares of all the roots of the equation $x^{2}+|2 x-3|-4=0$, is :
→
Let a tangent to the Curve $9 x^2+16 y^2=144$ intersect the coordinate axes at the points $A$ and $B$. Then, the minimum length of the line segment $A B$ is $.........$
→
If $A(4, - 3)$, $B(3, - 2)$ and $C\,(2,{\rm{ }}8)$ are the vertices of a triangle, then its centroid will be
→
The number of non-negative integer solutions of the equations $6 x+4 y+z=200$ and $x+y+z=100$ is
→
If $[x]$ denotes the greatest integer less than or equal to $x$, then the value of the integral $\int_{-\pi / 2}^{\pi / 2}[[x]-\sin x] d x$ is equal to:
→
The sum, of the coefficients of the first $50$ terms in the binomial expansion of $(1-x)^{100}$, is equal to
→
If $y = {e^{(1 + {{\log }_e}x)}}$, then the value of ${{dy} \over {dx}} = $
→
A ray of light passing through the point $P (2,3)$ reflects on the $x-$axis at point $A$ and the reflected ray passes through the point $Q(5,4)$. Let $R$ be the point that divides the line segment $AQ$ internally into the ratio $2: 1$. Let the co-ordinates of the foot of the perpendicular $M$ from $R$ on the bisector of the angle $PAQ$ be $(\alpha, \beta)$. Then, the value of $7 \alpha+3 \beta$ is equal to.......
→