Suppose a signal is represented by x(t) in the time domain and by X(f) in the frequency domain.
Suppose the impulse response of a linear time-invariant system is represented by h(t) in the time domain and by H(f) in the frequency domain.
When the signal passing through the system, what are the correct statements about the output?

Question

Suppose a signal is represented by x(t) in the time domain and by X(f) in the frequency domain.

Suppose the impulse response of a linear time-invariant system is represented by h(t) in the time domain and by H(f) in the frequency domain.

When the signal passing through the system, what are the correct statements about the output?

Answer

The output is the convolution of   X(f)  and   H(f)

Answer

The output is the product of   X(f)  and   H(f)

Answer

The output is the product of   x(t)  and   h(t)

Answer

The output is the convolution of   x(t)  and   h(t)

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