Let \(\vec a = 2\hat i - 7\hat j + 5\hat k\), \(\vec b = \hat i + \hat k\) and \(\vec c = \hat i + 2\hat j - 3\hat k\) be three given vectors. If \(\vec r\) is a vector such that \(\vec r \times \vec a = \vec c \times \vec a\) and \(\vec r \cdot \vec b = 0\), then \(|\vec r|\) is equal to:
Previous 10 Questions — JEE Main 2023 (1 February Evening Shift)
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Two dice are thrown independently.
Let \(A\) be the event that the number on the \(1^{\text{st}}\) die is less than t…
Topic: JEE Main 2023 (1 February Evening Shift)
If $A=\dfrac12\begin{bmatrix}1 & \sqrt{3}\\ -\sqrt{3} & 1\end{bmatrix}$, then:
Topic: JEE Main 2023 (1 February Evening Shift)
Let $a,b$ be two real numbers such that $ab
Topic: JEE Main 2023 (1 February Evening Shift)
The number of integral values of $k$ for which one root of the equation $2x^{2}-8x+k=0$ lies in the interval $(1,2)$ an…
Topic: JEE Main 2023 (1 February Evening Shift)
The area of the region given by $\{(x,y):\, xy\le 8,\ 1\le y\le x^{2}\}$ is:
Topic: JEE Main 2023 (1 February Evening Shift)
If $y(x)=x^{x},\ x>0$, then $y''(2)-2y'(2)$ is equal to:
Topic: JEE Main 2023 (1 February Evening Shift)
The value of the integral $\displaystyle \int_{-\pi/4}^{\pi/4}\frac{x+\pi/4}{\,2-\cos 2x\,}\,dx$ is:
Topic: JEE Main 2023 (1 February Evening Shift)
For the system of linear equations $\alpha x+y+z=1,\quad x+\alpha y+z=1,\quad x+y+\alpha z=\beta$, which one of the fol…
Topic: JEE Main 2023 (1 February Evening Shift)
Let $\vec a=5\hat{\imath}-\hat{\jmath}-3\hat{k}$ and $\vec b=\hat{\imath}+3\hat{\jmath}+5\hat{k}$ be two vectors. Then …
Topic: JEE Main 2023 (1 February Evening Shift)
The sum of the absolute maximum and minimum values of the function $f(x)=\lvert x^{2}-5x+6\rvert-3x+2$ in the interval …
Topic: JEE Main 2023 (1 February Evening Shift)
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Let $\alpha x = \exp(x^{\beta} y^{\gamma})$ be the solution of the differential equation
$2x^{2}y\,dy - (1 - xy^{2})\…
Topic: JEE Main 2023 (1 February Evening Shift)
Let $f:\mathbb{R}-\{0,1\}\to\mathbb{R}$ be a function such that
$f(x)+f\!\left(\frac{1}{1-x}\right)=1+x.$
Then $f(2)$…
Topic: JEE Main 2023 (1 February Evening Shift)
Let $S = \left\{ {x \in R:0 < x < 1\,\mathrm{and}\,2{{\tan }^{ - 1}}\left( {{{1 - x} \over {1 + x}}} \right) = {{\cos }…
Topic: JEE Main 2023 (1 February Evening Shift)
