If T is –ve, shift is to the left

means accelerating (compression) or decelerating (expansion)

When the time coefficient t is multiplied by a > 1, the signal is …

If t is multiplied by 0 < a < 1, the signal is compressed

What is the operation?

This is also called folding

In the inversion The signal is folded or mirrored around the … axis

Imagine the vertical line as a rectangle with an infinite small width 𝜖 and an infinitely large height

The 𝛿(𝑡) exists only at t = …

It is a causal signal, i.e. has value for 𝑡 ≥ 0

U(t) = 0 when t .. 0

in Unit Step : if g(t) =5 , t= 3
g(t) * u(t) =

A vector is specified by

g = cx + e

Find C for the following (مهم جه في الامتحان )

In Scaling the value of a is

If 𝜑 𝑡 = 𝑔 (2t) that mean T Will =

What is the operation? we make if ( -t + 5)