Question

Matrix Algebra Determinant: What's Wrong Here?

score 81 · Answer 1 · 2026-04-13 07:34:50

81

Views

Matrix Algebra Determinant: What's Wrong Here?

Published on 13 Apr 2026 - 7:34

score 652 · Answer 2 · 2026-04-14 21:28:23

652

Views

Show that the matrix $cA+B$ is not invertible

Published on 14 Apr 2026 - 21:28

score 75 · Answer 3 · 2026-04-14 22:34:05

75

Views

Calculate the determinant of a special matrix

Published on 14 Apr 2026 - 22:34

score 120 · Answer 4 · 2026-05-10 17:18:08

120

Views

Similarity of $3\times3$ matrices via Jordan canonical form

Published on 10 May 2026 - 17:18

score 35 · Answer 5 · 2026-04-13 20:53:33

35

Views

Evaluating Determinant (answer check)

Published on 13 Apr 2026 - 20:53

score 542 · Answer 6 · 2026-04-17 04:41:46

542

Views

Show that if $p(x)=a+bx+cx^2$ is a 2nd degree polynomial such that $p(1)=p(2)=p(3)=0$ then $p(x)=0$, using determinants.

Published on 17 Apr 2026 - 4:41

score 160 · Answer 7 · 2026-04-17 09:00:44

160

Views

$\det (A+B)=\det (A-B)$, prove that $B^{-1}$ exists iff $b_{11}\neq b_{21}$

Published on 17 Apr 2026 - 9:00

score 414 · Answer 8 · 2026-04-11 20:44:17

414

Views

Largest determinant possible of n by n matrix?

Published on 11 Apr 2026 - 20:44

score 3k · Answer 9 · 2026-04-15 21:19:24

3k

Views

Justify, without evaluating, that the determinant of the following matrix is zero

Published on 15 Apr 2026 - 21:19

score 1.6k · Answer 10 · 2026-04-12 22:14:59

1.6k

Views

If $A$, $B$ and $C$ are the angles of a triangle then find the value of $\Delta$

Published on 12 Apr 2026 - 22:14

score 1k · Answer 11 · 2026-05-10 16:56:58

1k

Views

Can some proof that $\det(A) \ne 0$ be checked faster than matrix multiplication?

Published on 10 May 2026 - 16:56

score 142 · Answer 12 · 2026-05-10 15:00:38

142

Views

Idea is correct, proof lacks rigor, coefficient of $t$ in $\det(I+tA)$

Published on 10 May 2026 - 15:00

score 79 · Answer 13 · 2026-04-17 02:46:46

79

Views

Evaluate a $n\times n$ special determinant

Published on 17 Apr 2026 - 2:46

score 735 · Answer 14 · 2026-04-29 12:15:05

735

Views

Gauss Jordan inverse matrix, row of all zeros

Published on 29 Apr 2026 - 12:15

score 409 · Answer 15 · 2026-04-16 23:01:03

409

Views

Generate a $5 × 5$ matrix such that the each entry is an integer between $1$ and $9$, inclusive, and whose determinant is divisible by $271$.

Published on 16 Apr 2026 - 23:01

List Question

Matrix Algebra Determinant: What's Wrong Here?

Show that the matrix $cA+B$ is not invertible

Calculate the determinant of a special matrix

Similarity of $3\times3$ matrices via Jordan canonical form

Evaluating Determinant (answer check)

Show that if $p(x)=a+bx+cx^2$ is a 2nd degree polynomial such that $p(1)=p(2)=p(3)=0$ then $p(x)=0$, using determinants.

$\det (A+B)=\det (A-B)$, prove that $B^{-1}$ exists iff $b_{11}\neq b_{21}$

Largest determinant possible of n by n matrix?

Justify, without evaluating, that the determinant of the following matrix is zero

If $A$, $B$ and $C$ are the angles of a triangle then find the value of $\Delta$

Can some proof that $\det(A) \ne 0$ be checked faster than matrix multiplication?

Idea is correct, proof lacks rigor, coefficient of $t$ in $\det(I+tA)$

Evaluate a $n\times n$ special determinant

Gauss Jordan inverse matrix, row of all zeros

Generate a $5 × 5$ matrix such that the each entry is an integer between $1$ and $9$, inclusive, and whose determinant is divisible by $271$.

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