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Signals and systems electrical engineering miscellaneous

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Signals and systems electrical engineering miscellaneous
  1. The signal having the Fourier transform
    X(ejΩ) = 1 -
    1
    		 e-jΩ
    3
    1 -
    1
    		 e-jΩ -
    1
    		 e-2jΩ
    48

    will be
    1. 2
      1
      		n +
      7
      		 -
      1
      		nu[n]
      9294
    2. 2
      		 -
      1
      		n +
      7
      1
      		nu[n]
      9294
    3. 2
      		 -
      1
      		n -
      7
      1
      		nu[n]
      9294
    4. 2
      1
      		n -
      7
      		 -
      1
      		nu[n]
      9294
Correct Option: A



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