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A certain book shop has 10 dozen chemist...

A certain book shop has 10 dozen chemistry books, 8 dozen physics books, 10 dozen economics books. Their selling prices are Rs. 80, Rs. 60, Rs. 40 each respectively. Using matrix algebra, find the total value of the books in the shop.

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A certain bookshop has 10 dozen chemistry books, 8 dozen physics books, 10 dozen economics books. Their selling prices are Rs80,Rs60 and Rs,40 each respectively. Find the total amount the bookshop will receive by selling all the books, using matrix algebra.

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SRISIRI PUBLICATION-IPE SCANNER (TEXUAL BITS)-Very Short Questions (2 marks) (Matrices)
  1. Find the trace of A, if A = [(1,2,-1//2),(0,-1, 2),(-1//2,2,1)]

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  2. Construct a 3 xx 2 matrix whose elements are defined by a(ij) = 1/2|i ...

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  3. A certain book shop has 10 dozen chemistry books, 8 dozen physics book...

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  4. if A = [(I,0)(0,-i)] then show that A^(2) = -1 (i^(2)=-1).

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  5. If A=[(i,0),(0,i)] then find A^(2).

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  6. Find the product [-1, 4, 2][(5),(1),(3)]

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  7. Find the product [(2,1,4),(6,-2,3)][(1),(2),(1)]

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  8. If A = [(2,1),(1,3)] and B = [(3,2,0),(1,0,4)], then find AB. Find BA ...

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  9. If A = [(1,-2,3),(-4,2,5)], B = [(2,3),(4,5),(2,1)] do AB and BA exist...

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  10. IF A=[{:(-1,2),(0,1):}] then find AA'. Do A and A' commute with respec...

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  11. If A = [(0,1,2),(1,2,3),(2,3,4)], B = [(1,-2),(-1,0),(2,-1)] then find...

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  12. If A = [(-2,1,0),(3,4,-5)] and B = [(1,-2),(4,3),(-1,5)] then find A +...

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  13. If A = [(1,5,3),(2,4,0),(3,-1,-5)], B = [(2,-1,0),(0,-2,5),(1,2,0)] th...

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  14. IF A=[{:(7,-2),(-1,2),(5,3):}],B=[{:(-2,-1),(4,2),(-1,0):}] then find ...

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  15. If A = [(cos alpha, sin alpha),(-sin alpha, cos alpha)] , then show th...

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  16. Is [(0,1,4),(-1,0,7),(-4,-7,0)] symmetric or shew symmetric?

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  17. If A = [(-1,2,3),(2,5,6),(3,x,7)] is symmetric, find value of x.

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  18. If [(0,4,-2),(-4,0,8),(2,-8,x)] is a skew symmetric matrix then find t...

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  19. Find the minors of -1 and 3 in the matrix [(2,-1,4),(0,-2,5),(-3,1,3)]

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  20. Find the cofactors of 2 and -5 in the matrix [{:(-1,0,5),(1,2,-2),(-4,...

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