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ISRO2009-20

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f(w,x,y,z)=Σ(1,3,4,6,9,11,12,14).

K-Map of given function - 

  1 1  
1     1
1     1
  1 1  

f(w, x, y, z) = xz' + x'z 

Ans- B. Independent of two variables. 

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