Question

If a signal f(t) has e energy t then signal f(3t)will have

Answer 1

Answer:

Hey mate....

Explanation:

i will be using int as a symbol for integration

E = int( f(t)^3 dt )

now

E' = int ( f(3t)^3 dt )

if 2t = x

E' = int ( f(x)^3 dx ) / 3

E' = E / 3

so it has half the energy.

Answer 2

Answer:

signal $f(3t)$ will have $\frac{E}{3}$

Explanation:

Power signals

A periodic signal is always a power signal if its Fourier transform is a set of discrete components comprising of a fundamental and its harmonics. In case of sinusoid it has only the fundamental component.

Energy Signal

An aperiodic signal is an energy signal if its Fourier transform is continuous.

If the energy of signal $x(t)$ is E then The energy of signal $Ax(Bt + c)$is  $\frac{A^2E}{|B|}$

Calculation: Comparing with the standard equation

A = 1

B = 3

C = 0

Energy of $y(t) =\frac{A^2E}{|B|}$

$=\frac{1^2E}{3}$

= $\frac{E}{3}$

Reference Link

• https://brainly.in/question/33815581
• https://brainly.in/question/24078117