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Consider the matrix chain A1A2A3, where A1 has dimension 20 10, ?? has dimension 10 x 50 and A3 has dimension 50 x 5. Which

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Consider the matrix chain A1A2A3, where A1 has dimension 20 10, ?? has dimension 10 x 50 and A3 has dimension 50 x 5. Which of the following parenthesizations require the minimum number of scalar multiplications? (A1A2)A3) (A1(A2A3)) All parenthesizations have the same number of scalar multiplications This chain of matrices cannot be parenthesized because the sequence of matrices is incompatible

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