Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • School
  • please solve rd sharma class 12 chapter adjoint and inverse of a matrix exercise multiple choice questions question 4 maths textbook solution

please solve rd sharma class 12 chapter adjoint and inverse of a matrix exercise multiple choice questions  question 4 maths textbook solution

Answers (1)

\text { (b) }\left[\begin{array}{cc} d & -b \\ -c & a \end{array}\right]

Given: s=\left[\begin{array}{cc} a & b \\ c & d \end{array}\right]

Hint:  find adjoint S by finding cofactors and transposing it.

Solution :

 \begin{aligned} &S=\left[\begin{array}{ll} a & b \\ c & d \end{array}\right] \\ &C_{11}=(-1)^{1+1} d=d \\ &C_{12}=(-1)^{1+2} c=-c \\ &C_{21}=(-1)^{2+1} b=-b \\ &C_{22}=(-1)^{2+2} a=a \\ &\text { Adj } S=\left[\begin{array}{cc} d & -c \\ -b & a \end{array}\right]^{T}=\left[\begin{array}{cc} d & -b \\ -c & a \end{array}\right] \end{aligned}

Posted by

Info Expert 29

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

PM Modi's Pariksha Pe Charcha 2025 to be held next month, registrations open till January 14
anam-khan

CBSE Board Exams 2025: Online portal for availing exemptions by CWSN students opens
anam-khan

Board Exams: States agree to equivalence; no question paper ‘jumbling’ from next year, says PARAKH CEO

Latest Question