Let A=[aij] be a real matrix of order 3×3, such that ai1+ai2+ai3=1, f – InterviewSolution

1.	Let A=[aij] be a real matrix of order 3×3, such that ai1+ai2+ai3=1, for i=1,2,3. Then, the sum of all the entries of the matrix A3 is equal to:
Answer» Let $A = [a_{i j}]$ be a real matrix of order $3 \times 3$ , such that $a_{i 1} + a_{i 2} + a_{i 3} = 1$ , for $i = 1, 2, 3.$ Then, the sum of all the entries of the matrix $A^{3}$ is equal to:

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