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In a matrix, A=[{:(2,5,19,-7),(35,-2,5//...

In a matrix, `A=[{:(2,5,19,-7),(35,-2,5//2,12),(sqrt(3),1,-5,17):}]`
(a) Write the order of the matrix.
(b) Write the elements `a_(13),a_(21),a_(23)` and `a_(24)`.

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The correct Answer is:
`3xx4`.
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ARIHANT PUBLICATION-MATRICES -CHAPTER PRACTICE (Very Short Answer Type Questions)
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  12. If A=[{:(2,4),(3,2):}]andB=[{:(1,3),(-2,5):}], then find A-B.

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  19. Show by an example that for AneO,BneOandAB=O.

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