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Signals & SystemsLTI Frequency Response

For a stable LTI system, a bounded sinusoidal input produces a steady-state sinusoidal output at?

  • AThe same frequency
  • BTwice the input frequency
  • CZero frequency only
  • DA random frequency
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Correct Answer: A. The same frequency
Explanation: An LTI system does not create new frequencies from a single sinusoidal input in steady state; it changes only amplitude and phase at that frequency.
Reference: Standard signals and systems: lti frequency response
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