The integral of unit step function is a ramp of slope unity.

1.	The integral of unit step function is a ramp of slope unity.
A.	y(n) = n x(n)
B.	y(n) = x(n) - x(n - 1)
C.	y(n) = x(- n)
D.	y(n) = x(n) cos 2pf0n
Answer» B. y(n) = x(n) - x(n - 1)

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