Electronics and Communication Engineering - Exam Questions Papers - Discussion

16. 

Find 'X' in the circuit below :

f1(A, B, C, D) = Σ(6, 7, 13, 14);
f2(A, B, C, D) = Σ(3, 6, 7);
f3(A, B, C, D) = Σ(5, 6, 7, 14, 15)

[A]. p(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15)
[B]. 0
[C]. Σ(14)
[D]. 1

Answer: Option C

Explanation:

f1(A, B, C, D) = ∑(6, 7, 13, 14)

f2(A, B, C, D) = ∑(3, 6, 7)

f1f2 = ∑(3, 13, 14)

f3 x (f1f2) = ∑(14) = y

X = f1 x y ⇒ ∑14.


Manikanta said: (Jun 25, 2016)  
Here,

X = (f1 + y')' = 0.

Jeet said: (Jul 19, 2016)  
I also think that the answer is '0'.

Hari said: (Jul 2, 2017)  
Cam someone explain it clearly?

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