Kontrollküsimused 3. osa kohta

Consider these signals:

1.

3_6_a.png

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2.

3_6_d.png

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3.

3_6_b.png

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4.

3_6_e.png

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5.

3_6_c.png

Match the equations with the corresponding signals!

Signal #1
cos(t)

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u[n+2]

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delta[n-3]

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e^wt

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e^jwt

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Signal #2
cos(t)

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u[n+2]

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delta[n-3]

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e^wt

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e^jwt

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Signal #3
cos(t)

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u[n+2]

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delta[n-3]

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e^wt

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e^jwt

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Signal #4
cos(t)

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u[n+2]

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delta[n-3]

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e^wt

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e^jwt

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Signal #5
cos(t)

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u[n+2]

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delta[n-3]

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e^wt

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e^jwt

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Which signal is shown on the figure?

3_7.png

Is the sum of two periodic signals also always periodic?

Which of the following signals are periodic?

A system is described with y(t)=x(t)*cos(w*t), where x(t) is the input of the system. Is the system linear?

A discrete time signal is shown on the figure below. What is the formula of the signal?

3_10.png

According to Euler formula d1ec3f0180f1c3ae3bdb18d91c6cda33.png equals to ...


 

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