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 Fill in the blanks question 7

need solution for RD Sharma maths class 12 chapter 5 Determinants exercise Fill in the blanks question 7

Answers (1)

Answer: \left | 3AB \right |=-81

Hint: Here, we use basic concept of \left | KA \right |=K^{n}\left | A \right |

Given: A and B are square matrix of order 3. So, n = 3

            \left | A \right |=(-1), \; \; \left | B \right |=3

Solution: Here, \left | 3AB \right |

            Here 3 is just like K. So,

            \left | KAB \right |=K^{n}\left | A \right |\left | B \right |

            \left | 3AB \right |=3^{3}\times -1(3)\; \; \; \; \; \; \; \left [ n=3,\left | A \right | =-1,\left | B \right |=3\right ]

            \left | 3AB \right |=-81

So, here \left | 3AB \right |=-81

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

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