If the matrix is singular, then the value of must be
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2 marks, −1MathematicsMatrices, determinants and linear systemsSingular matrices and invertibilityModerateabout 2 min
JNU SIS 2017 Question 5: Matrices, determinants and linear systems
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If the matrix [1 2 1; 2 0 α; 1 α 1] is singular, then the value of α must be (A) 1 (B) 2 (C) 3 (D) 4
Also written as: If the matrix [1 2 1; 2 0 alpha; 1 alpha 1] is singular, then the value of alpha must be
Matrices, determinants and linear systems has come up 102 times in 7 exams since 2006.
What this question tests
This question is on Singular matrices and invertibility, part of Matrices, determinants and linear systems in Mathematics.
When a matrix has an inverse and what singularity means.
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