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 Solution of Simultaneous Linear Equation exercise 7.1 question 4 subquestion (ii)

Provide solution for RD Sharma maths class 12 chapter Solution of Simultaneous Linear Equation exercise 7.1 question 4 subquestion (ii)

Answers (1)

Answer:

 Inconsistent

Given:

2x+3y=5 \quad , \quad 6x+9y=10

Hint:

Inconsistent means two or more equations that are impossible to solve based on using one set of values for variables.

Solution:

The given system of equations can be expressed as follows

        A X=B \\ Here, \\ A=\left[\begin{array}{cc}2 & 3 \\ 6 & 9\end{array}\right] \quad, \quad X=\left[\begin{array}{l}x \\ y\end{array}\right] \quad and \quad B=\left[\begin{array}{c}5 \\ 10\end{array}\right] \\ Now, \\ |A|=\left|\begin{array}{cc}2 & 3 \\ 6 & 9\end{array}\right|=|18-18|=0

        C_{i j}\; be\; the\; co-\! f\! actor\; o\! f\; the\; elements\; a_{i j}\; in \; A=\left[a_{i j}\right].\; Then,

        \begin{aligned} &C_{11}=-1^{1+1}(9)=9 \quad, \quad C_{12}=-1^{1+2}(6)=-6 \\ &C_{21}=-1^{2+1}(3)=-3 \quad, \quad C_{22}=-1^{2+2}(2)=2 \\ &(a d j A) B=\left[\begin{array}{cc} 9 & -3 \\ -6 & 2 \end{array}\right]\left[\begin{array}{c} 5 \\ 10 \end{array}\right]=\left[\begin{array}{c} 45-30 \\ -30+20 \end{array}\right]=\left[\begin{array}{c} 15 \\ -10 \end{array}\right] \neq 0 \end{aligned}

Hence, the given system of equation is inconsistent.

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

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