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If A = open square brackets table row i 0 row 0 i end table close square brackets, n element of N, then A4n equals -

  1. open square brackets table row 1 0 row 0 1 end table close square brackets    
  2. open square brackets table row i 0 row 0 i end table close square brackets    
  3. open square brackets table row 0 i row i 0 end table close square brackets    
  4. open square brackets table row 0 0 row 0 0 end table close square brackets    

The correct answer is: open square brackets table row 1 0 row 0 1 end table close square brackets


    A2=open square brackets table row cell – 1 end cell 0 row 0 cell – 1 end cell end table close square bracketsrightwards double arrowA4=open square brackets table row 1 0 row 0 1 end table close square brackets=Irightwards double arrowA4n=(I)n=I

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