Matrices and Systems

Find (Y + Z) + 2X

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• Does Not Exist

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If A and B are symmetric matrices of same order, then AB - BA is

• Skew-symmetric Matrix

• Symmetric Matrix

• Zero Matrix

• Identity Matrix

The Dimension of the Matrix is

• Number of element X number of rows

• Number of Rows X Number of Columns

• Number of Rows X Number of Rows

Diagonal Matrix is:

• A Matrix which all entries are zero

• A Matrix which entries are one

• A Matrix which diagonal entries are not zero's and the entries outside the main diagonal are all zero's

Identity Matrix is

• All the main diagonal elements are 1's and all the remaining elements are zero's

• All the main diagonal elements are zeros and all the remaining elements are one.

• All the main diagonal elements are Not one and all the remaining elements are one.

• 11    8
  -4     2
• 3     2
  -6    -6
• -3    2
  -4    -6
• 10    8
  -6    2

• 3    -8
  0   -1
• 3   -4
  8  -13
• -3   8
  0    1
• 3   -8
  -8    1

• -2   4   -9
  -1   -6   -17
• -8   12   -9
  1   6   17
• -8   4   -9
  15   6   7
• -2   -4   -9
  15   6    7

• 17   12
  25   18
• 8   9
  12   6
• 6   6
  7   5
• 12   10
  10   12