# Electronics and Communication Engineering - Signals and Systems

Exercise : Signals and Systems - Section 8
46.
Which one of following is a stataic system?
y(n) = x(n) - x(n - 1)
y(n) = x(2n) - x(2n-1)
y(n) = x(n - 1)
y(n) = ex(n)
Explanation:
No answer description is available. Let's discuss.

47.
The impulse response of the DT - LTI system is given below

Check whether the system is
1. Stable
2. Casual
3. Dynamic.
1 and 2
2 and 3
1 and 3
1, 2 and 3
Explanation:
No answer description is available. Let's discuss.

48.
If R(t) is autocorrelation of a waveform v(t) and R(0) is autocorrelation for t = 0, then
R(0) > R(t)
R(0) ≥ R(t)
R(0) < R(t)
R(0) ≤ R(t)
Explanation:
No answer description is available. Let's discuss.

49.

Assertion (A): Impulse function is an important function in network analysis.

Reason (R): Convolution integral enables us to find the response of a network to an arbitary input in terms of the impulse response.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is true, R is false
A is false, R is true