Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • School
  • Provide solution for RD Sharma maths class 12 chapter 4 Algebra of Matrices exercise Fill in the blank question 14

Provide solution for RD Sharma maths class 12 chapter 4 Algebra of Matrices exercise Fill in the blank question 14

Answers (1)

Answer:

 k, a, b = (-6, -4, -9)

Hint:

 Use the basics of scalar matrix.

Given:

 A=\left[\begin{array}{cc} 0 & 2 \\ 3 & -4 \end{array}\right], k A=\left[\begin{array}{cc} 0 & 39 \\ 2 b & 24 \end{array}\right]

Solution:

Given

\begin{aligned} &k A=k\left[\begin{array}{cc} 0 & 2 \\ 3 & -4 \end{array}\right]=\left[\begin{array}{cc} 0 & 2 k \\ 3 k & -4 k \end{array}\right] \\ &{\left[\begin{array}{cc} 0 & 39 \\ 2 b & 24 \end{array}\right]=\left[\begin{array}{cc} 0 & 2 k \\ 3 k & -4 k \end{array}\right]} \end{aligned}

By the comparison,

-4 k=24 k=-6

And

3 a=2 k a=2 \times \frac{(-6)}{3}=-4

Also,

2 b=3 k b=3 \times \frac{-6}{2}=-9

Posted by

Gurleen Kaur

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 Class 12 Supplementary Exam 2026: 'Chapter-wise weightage ignored,' allege students; seek grace marks
anam-khan

CBSE SARAS 7.0: Affiliation application deadline extended to September 30 for 2027-28 session
anam-khan

CBSE Class 12 supplementary exam 2026 on July 28; major subjects, timings, exam day guidelines

Latest Question