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What  equals to?

  1. 4
  2. 5
  3. 7
  4. None of these

Answer (Detailed Solution Below)

Option 4 : None of these
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Detailed Solution

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Concept:


Calculation:

f(x) = 

Let, I = 

or I = 

= 

= (16 - 8) - (12 - ) + (- 20) - (8 - 16) 

= 8 + 8 - 

= 16 - 15

= 1

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