Trace of a scalar matrix of order 4xx4 w...

Trace of a scalar matrix of order `4xx4` whose one of the principal diagonal elements is 4 is _______ .

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PEARSON IIT JEE FOUNDATION-MATRICES-TEST YOUR CONCEPTS (VERY SHORT ANSWER TYPE QUESTIONS)

For a matrix {:[(4,1,2),(2,4,3),(5,8,6)]:} what is the second row and...
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Trace of a scalar matrix of order 4xx4 whose one of the principal diag...
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If order of matrix A is 4xx3 and AB is 4xx5, then the order of matrix ...
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Two matrices A={:[(2,3),(5,-1)]:}andB={:[(x,3),(5,-3-y)]:} are equal, ...
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If A={:[(10,8),(-6,6)]:}andB={:[(2,-3),(5,0)]:} then find A+B.
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If A={:[(12,7),(9,6)]:}andB={:[(8,10),(-2,-5)]:}, then find (A-B).
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If A={:[(1,2,3),(4,5,6)]:}, then A^(T) = .
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If A={:[(1,2),(3,4)]:}, then kA (where 'k' is a scalar) = .
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If A={:[(a,p),(b,q),(c,r)]:}, then (A^(T))^(T) = .
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The order of matrix A+B^(T) is 4xx3, then the order of matrix B is .
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If A={:[(3,24),(-4,8)]:}, then check whether it is symmetric matrix or...
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{:[(0,-3),(3,0)]:} is a matrix.
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The product of {:[(1),(2)]:} and {:[(3,4)]:} is .
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The product of {:[(a,b),(c,d)]:}and{:[(x),(y)]:} is .
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The product of {:[(2,-4,4)]:},and{:[(1),(3),(5)]:} is .
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If all the diagonal elements in a diagonal matrix is 0, then it is a ...
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If {:[(2,-1,0),(9,2,4),(6,3,-9)]:}, find (k+l) A.
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If A={:[(2,3),(4,1)]:},B={:[(9,5),(-6,1)]:}andC={:[(2,-6),(-3,1)]:} th...
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If A={:[(1,2),(3,4)]:}andB={:[(5,6),(7,8)]:}, then find 3A+7B.
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If 5{:[(-3,1),(x,2)]:}+{:[(y,4),(3,2)]:}={:[(-15,9),(6,z)]:}, then fin...
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