Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • School
  • explain solution RD Sharma class 12 chapter 5 Determinants exercise Fill in the blanks question 20 maths

explain solution RD Sharma class 12 chapter 5 Determinants exercise Fill in the blanks question 20 maths

Answers (1)

Answer: -64

Hint: Here, we use basic concept of determinant

            |K A B|=K^{n}|A||B|

Given:  n = 3

            \left | A \right |=-2

            \left | B \right |=4

Solution: A and B are 3\times 3 order of matrix

            So, n = 3

            Here, \left | 2AB \right |\; \; \; \; \; \; \; So,K=2

So, now

            |K A B|=K^{n}|A||B|

            |2 A B|=2^{3} \times-2 \times 4 \; \; \; \; \; \; \; \; \; \quad[n=3,|A|=-2,|B|=4]

            \begin{aligned} &|2 A B|=8 \times-2 \times 4 \\ &|2 A B|=8 \times-8 \\ &|2 A B|=-64 \end{aligned}

Posted by

infoexpert26

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

Over 3 crore students register for PM Modi’s Pariksha Pe Charcha 2025
anam-khan

CBSE Class 10, 12 admit card 2025 for board exam likely by last week of January; past trends
anam-khan

CBSE Board Exam 2025: Admit card for Class 10th, 12th soon; dates awaited

Latest Question