JEE Mains · Maths · STD 12 - 3 and 4 . metrices and determinant
Consider a matrix \(A =\left[\begin{array}{ccc}\alpha & \beta & \gamma \\ \alpha^{2} & \beta^{2} & \gamma^{2} \\ \beta+\gamma & \gamma+\alpha & \alpha+\beta\end{array}\right]\), where \(\alpha, \beta, \gamma\) are three distinct natural numbers. If \(\frac{\operatorname{det}(\operatorname{adj}(\operatorname{adj}(\operatorname{adj}(\operatorname{adj} A))))}{(\alpha-\beta)^{16}(\beta-\gamma)^{16}(\gamma-\alpha)^{16}}=2^{32} \times 3^{16}\), then the number of such \(3 -\) tuples \((\alpha, \beta, \gamma)\) is \(.....\)
- A \(42\)
- B \(41\)
- C \(40\)
- D \(43\)
Answer & Solution
Correct Answer
(A) \(42\)
Step-by-step Solution
Detailed explanation
\(A=\left[\begin{array}{ccc}\alpha & \beta & \gamma \\ \alpha^{2} & \beta^{2} & \gamma^{2} \\ \beta+\gamma & \gamma+\alpha & \alpha+\beta\end{array}\right]\) \(R _{3} \rightarrow R _{3}+ R _{1}\)…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Maths
- Let the values of \(\lambda\) for which the shortest distance between the lines \(\frac{x-1}{2}=\frac{y-2}{3}=\frac{z-3}{4}\) and \(\frac{x-\lambda}{3}=\frac{y-4}{4}=\frac{z-5}{5}\) is \(\frac{1}{\sqrt{6}}\) be \(\lambda_1\) and \(\lambda_2\). Then the radius of the circle passing through the points \((0,0),\left(\lambda_1, \lambda_2\right)\) and \(\left(\lambda_2, \lambda_1\right)\) isJEE Mains 2025 Medium
- Suppose \(\quad f : R \rightarrow(0, \infty)\) be a differentiable function such that \(5 f ( x + y )= f ( x ) \cdot f ( y ), \forall x , y \in R\). If \(f(3)=320\), then \(\sum \limits_{n=0}^5 f(n)\) is equal to :JEE Mains 2023 Hard
- Let \(Q\) be the mirror image of the point \(P (1,2,1)\) with respect to the plane \(x+2 y+2 z=16\). Let \(T\) be a plane passing through the point \(Q\) and contains the line \(\vec{r}=-\hat{k}+\lambda(\hat{i}+\hat{j}+2 \hat{k}), \lambda \in R\). Then, which of the following points lies on \(T\) ?JEE Mains 2022 Hard
- If the events \(A\) and \(B\) are mutually exclusive events such that \(P\left( A \right) = \frac{{3x + 1}}{3}\) and \(P\left( B \right) = \frac{{1 - x}}{4}\), then the set of possible values of \(x\) lies in the intervalJEE Mains 2013 Hard
- Let \(\vec{a}\) and \(\vec{b}\) be two vector such that \(|\vec{a}|=\sqrt{14}\), \(|\vec{b}|=\sqrt{6}\) and \(|\vec{a} \times \vec{b}|=\sqrt{48}\). Then \((\vec{a} \cdot \vec{b})^2\) is equal to \(...........\).JEE Mains 2023 Easy
- Let \( \vec{a}=2\hat{i}-\hat{j}-\hat{k}, \vec{b}=\hat{i}+3\hat{j}-\hat{k} \) and \( \vec{c}=2\hat{i}+\hat{j}+3\hat{k} \). Let \( \vec{v} \) be the vector in the plane of the vectors \( \vec{a} \) and \( \vec{b} \), such that the length of its projection on the vector \( \vec{c} \) is equal to \( \frac{1}{\sqrt{14}} \). Then \( |\vec{v}| \) is equal isJEE Mains 2026 Easy
More PYQs from JEE Mains
- A man is observing, from the top of a tower, a boat speeding towards the tower from a certain point A, with uniform speed. At that point, angle of depression of the boat with the man's eye is \(30^{\circ}\) (Ignore man's height). After sailing for \(20\) seconds, towards the base of the tower (which is at the level of water), the boat has reached a point \(B\), where the angle of depression is \(45^{\circ}\). Then the time taken (in seconds) by the boat from \(B\) to reach the base of the tower isJEE Mains 2021 Hard
- If the variance of the terms in an increasing \(A.P.\), \(b _{1}, b _{2}, b _{3}, \ldots b _{11}\) is \(90,\) then the common difference of this \(A.P.\) isJEE Mains 2020 Medium
- If \(z \) is a complex number of unit modulus and argument \(\theta\), then \({\rm{arg}}\left( {\frac{{1 + z}}{{1 + (\bar z)}}} \right)\) equals.JEE Mains 2013 Medium
- Two circles each of radius \(5\, units\) touch each other at the point \((1,2)\). If the equation of their common tangent is \(4 \mathrm{x}+3 \mathrm{y}=10\), and \(\mathrm{C}_{1}(\alpha, \beta)\) and \(\mathrm{C}_{2}(\gamma, \delta)\), \(\mathrm{C}_{1} \neq \mathrm{C}_{2}\) are their centres, then \(|(\alpha+\beta)(\gamma+\delta)|\) is equal to .... .JEE Mains 2021 Hard
- Statement \(-1 :\) The value of the integral \(\mathop \smallint \limits_{\frac{\pi }{6}}^{\frac{\pi }{3}} \frac{{dx}}{{1 + \sqrt {\tan x} }} = \frac{\pi }{6}\) Statement \(-2 :\) \(\;\mathop \smallint \limits_a^b {\rm{f}}\left( {\rm{x}} \right)dx = \mathop \smallint \limits_a^b {\rm{f}}\left( {a + b - x} \right)\;dx\)JEE Mains 2013 Medium
- The number of solutions of the equation \(\sin x=\) \(\cos ^{2} x\) in the interval \((0,10)\) isJEE Mains 2022 Medium