Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Matrices and Determinants question

2023 · 12 Apr · Shift 1 · Q35
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Mathematics
  4. /Matrices and Determinants
  5. /2023 · 12 Apr · Shift 1 · Q35

Matrices and Determinants question

2023 · 12 Apr · Shift 1 · Q35

JEE MainMathematicsMatrices and DeterminantsNumerical+4 / −1
Let Dk=∣12k2k−1nn2+n+2n2nn2+nn2+n+2∣\mathrm{D}_{\mathrm{k}}=\left|\begin{array}{ccc}1 & 2 k & 2 k-1 \\ n & n^{2}+n+2 & n^{2} \\ n & n^{2}+n & n^{2}+n+2\end{array}\right|Dk​=​1nn​2kn2+n+2n2+n​2k−1n2n2+n+2​​. If ∑k=1nDk=96\sum_{k=1}^{n} \mathrm{D}_{\mathrm{k}}=96∑k=1n​Dk​=96, then nnn is equal to ‾\underline{\hspace{2cm}}​.
Numerical answer
PreviousNext

More from Matrices and Determinants

  • For the system of linear equations 2x+4y+2az=bx+2y+3z=42x−5y+2z=8 which of the following is NOT correct?2023 · MCQ
  • Let B=​11α​32α​α34​​,α>2 be the adjoint of a matrix A and ∣A∣=2. Then [α​−2α​α​]B​α−2αα​​…2023 · MCQ
  • The number of symmetric matrices of order 3, with all the entries from the set {0,1,2,3,4,5,6,7,8,9} is :2023 · MCQ
  • If the system of equations 2x+y−z=52x−5y+λz=μx+2y−5z=7 has infinitely many solutions, then (λ+μ)2+(λ−μ)2 is equal to2023 · MCQ
  • If A and B are two non-zero n × n matrices such that A2+B=A2B, then :2023 · MCQ
  • If the system of equations x+2y+3z=34x+3y−4z=48x+4y−λz=9+μ has infinitely many solutions, then the ordered pair (λ,μ) is equal to :2023 · MCQ
  • Let S 1​ and S 2​ be respectively the sets of all a∈R−{0} for which the system of linear equations ax+2ay−3az=1(2a+1)x+(2a+3)y+(a+1)z=2(3a+5)x+(a+5)y+(a+2)z=3 has unique solution and…2023 · MCQ
  • Let A1​,A2​,A3​ be the three A.P. with the same common difference d and having their first terms as A,A+1,A+2, respectively. Let a, b, c be the 7th,9th,17th terms of A1​,A2​,A3​,…2023 · Numerical