Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • School
  • Need solution for RD Sharma maths Class 12 Chapter 5 Determinants Exercise VSQ Question 57 maths textbook solution.

Need solution for RD Sharma maths Class 12 Chapter 5 Determinants Exercise VSQ Question 57 maths textbook solution.

Answers (1)

Answer: 4

Hint: Here we use basic concept of determinant of matrix

Given: 

\begin{aligned} &A \text { is } 3 \times 3 \text { matrix So } n=3\\ &A B=2 I\\ &|A|=2 \text { So, }|B|=? \end{aligned}

Solution :

AB = 2I

\rightarrow Take determinant on both sides

\begin{aligned} &|A B|=|2 I| \\ &|A B|=2^{3} \times 1 \quad\left(\begin{array}{c} n=3 \\ |I|=1 \\ |k A|=k^{n}|A| \end{array}\right) \end{aligned}

\begin{aligned} &|A| \times|B|=8 \\ &|B|=\frac{8}{2}=4 \quad(|A|=2) \end{aligned}

Posted by

infoexpert23

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

CBSE announces deadline for Class 10, 12 direct admissions, subject change
anam-khan

CBSE warns about unauthorised sources offering ‘quick’ ways of getting duplicate marksheets, certificates
anam-khan

CBSE unveils 8 major changes for Class 10, 12 board exams; what students need to know

Latest Question