If x(n) = u (-n) , then X(z) and ROC is

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
No Explanation available for this question

If x(n) =n(1/3)3 u(n) X(z) and ROC is

1.  

2.  

3.  

4.  None of the above

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4
Correct Answer :


Explanation :
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What Should be the ROC of H(z) and h(n) the system is anti – casual if

1.  h(n) = (1/2)n  u(n) – 2(3)n  u(-n-1) ; < z? > 3

2.  h(n) = - [(1/2)n u(n) + 2(3)n u(-n-1)] ;?z? < 1/2

3.  h(n) = (1/2)n u(n) + 2(3)n u(n);?z? > 3

4.  None of the above

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4
Correct Answer :

h(n) = (1/2)n u(n) + 2(3)n u(n);?z? > 3


Explanation :
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Inverse z-transform of 1(one) is

1.  δ(n+1)

2.  δ(n)

3.  δ(n-1)

4.  u(n)

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4
Correct Answer :

δ(n)


Explanation :
No Explanation available for this question

z-transform of y(n) = n[u(n)] is

1.  z/(1-z-1)2

2.  z-1/(1-z-1)2

3.  z/(1-z)2

4.  z-1/(1-z-1)2

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4
Correct Answer :

z-1/(1-z-1)2


Explanation :
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If x(n) is anticausal(i.e. if it is left sided and equal to 0 for n > 0),then ROC also included as

1.  z = 0

2.  z = ∞

3.  z = -∞

4.  z = 1 (pole)

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4
Correct Answer :

z = 0


Explanation :
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For z-transform, z > 1/3 if one pole is z =1/3,then other pole is

1.  z = -1/3

2.  z = 1/4

3.  z = -1/4

4.  z = 0

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4
Correct Answer :

z = 1/4


Explanation :
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What is the value of z { cos (ω0n) u(n) } when ROC , z > 0

1.  

2.  

3.  

4.  None of these

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4
Correct Answer :


Explanation :
No Explanation available for this question

z - transform of δ(n-k) is

1.  z-k

2.  zk+1

3.  z1/k

4.  z-k

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4
Correct Answer :

z-k


Explanation :
No Explanation available for this question

z-transform of x(n) = [4(2n) – 5(3n)] u(n) is

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
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