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If D = diag (d1, d2, d3, ...,dn), where d1not equal to 0 for all i = 1,2,....,n; then D–1 is equal to-

  1. D    
  2. In    
  3. diag (d1–1, d2–1, ....,dn–1)    
  4. None of these    

The correct answer is: diag (d1–1, d2–1, ....,dn–1)

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