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If A = [[2,4],[3,2]] and B = [[1,4],[-3,...

If A = `[[2,4],[3,2]]` and B = `[[1,4],[-3,2]]`,then `2A + 3B` =

A

`[[7,20],[-3,10]]`

B

`[[7,-20],[-3,10]]`

C

`[[-7,20],[-3,10]]`

D

`[[7,20],[3,10]]`

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The correct Answer is:
A
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JMD PUBLICATION-MATRICES-EXERCISE
  1. If [[3y-x,-2x],[3,7]] = [[5,-2],[3,7]],then find x and y

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  2. If A = [[2,4],[3,2]] and B = [[1,4],[-3,2]],then 2A + 3B =

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  3. Find x if A = [[2,3,-1],[x,-5,0],[-1,0,7]] is symmetric matrix

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  4. The number of all positive matrices of order 3 × 3 with each entry 0 o...

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  5. If A is 3 × 4 matrix and B is 4 × 3 matrix,then the order of AB is

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  6. If A is a (x + 2) × (y - 3) matrix and B is a 2 × 5 matrix AB is a 3 ×...

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  7. If [[4,3],[x,5]] = [[y,3],[1,5]] ,then x^2 + y^2 =

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  8. If A is of order 3 × 4 and B is of order 4 × 2,then order of AB is

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  9. If A is of order 3 × 2 and B is of order 3 × 4,then order of (AB)' is

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  10. If A = [[0,a,3],[2,b+2,-1],[-3,1,0]] is skew symmetric, then 2a + b =

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  11. If A,B are symmetric matrices of the same order,then AB - BA is

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  12. Matrices A and B will be inverse of each other if

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  13. If A = [1,2,3] and B = [[2],[4],[6]],then AB is

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  14. State True/False: If A is a symmetric matrix ,then A' = -A

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  15. State True/False: Every rectangular matrix can be expressed as sum of ...

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  16. State True/False: If A is of order 2 × 3 and B is of order 3 × 4,then ...

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  17. If (A =[[2,3],[4,5]]), prove that A-A' is a skew symmetric matrix wher...

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  18. IF(A=[[3,-4],[-1,2]]), find a matrix B such thet (AB = 1)

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  19. Construct a (2 times 2) matrix where (a(ij)=(i+(2)j)^(2)/(4))

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  20. If (A=[[3,-2],[4,-2]]), find K such that (A^2=KA - 2I2).

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