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+8 votes
502 views

The determinant of the matrix $$\begin{bmatrix}2 &0  &0  &0 \\  8&  1&  7& 2\\  2&  0&2  &0 \\  9&0  & 6 & 1 \end{bmatrix}$$

  1. 4
  2. 0
  3. 15
  4. 20
asked in Linear Algebra by Veteran (68.8k points)
edited by | 502 views

3 Answers

+7 votes
Best answer

Answer: A

2*\begin{bmatrix} 1 & 7 & 2\\ 0 & 2 & 0\\ 0 & 6 & 1 \end{bmatrix} = 4

answered by Veteran (35.8k points)
Please explain?
+1 vote
2*1*2*1=4 break it into determinant of smaller pieces where you are doing it in such a way that you should have to do lesser number of operations
answered by Veteran (14k points)
if we do nornally by cofactor method we get 20 as ans why that's not true?
+1 vote

2*1*2*1 = 4 so option A is right

answered by Boss (9.5k points)


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