The Gateway to Computer Science Excellence
First time here? Checkout the FAQ!
+3 votes

Consider the following system of linear equations : $$2x_1 - x_2 + 3x_3 = 1$$ $$3x_1 + 2x_2 + 5x_3 = 2$$ $$-x_1+4x_2+x_3 = 3$$ The system of equations has

  1. no solution
  2. a unique solution
  3. more than one but a finite number of solutions
  4. an infinite number of solutions
asked in Linear Algebra by Veteran (13.6k points) | 422 views

2 Answers

+7 votes
Best answer
rank of matrix = rank of augmented matrix = no of unknown = 3
so unique solution..
answered by Veteran (48.3k points)
selected by
Can case C arise? If Yes, how shall we determine?

when rank of matrix = rank of augmented matrixno of unknown 

then it is infinite solutions. r < n, that is option D. I'm asking about option C
i think more than one but a finite number of solutions will never arise

as we have only 3 cases r=n,r<n and r>n
yes c option case can never arise
0 votes

Determinant of matrix =14 which is non zero

If The determinant of the coefficient matrix is non zero then definitely the system of given equation has a unique solution 

 so option B

answered by Boss (7.3k points)

Related questions

Quick search syntax
tags tag:apple
author user:martin
title title:apple
content content:apple
exclude -tag:apple
force match +apple
views views:100
score score:10
answers answers:2
is accepted isaccepted:true
is closed isclosed:true

29,017 questions
36,844 answers
34,721 users