16A system is time-invariant if:AIt is linearBIts output is always constantCIt has no memoryDA delay in the input causes the same delay in the outputView AnswerDiscussWorkspaceReportSaveEasy
17A system whose output depends only on the present input is:ADynamicBMemoryless (static)CCausal onlyDUnstableView AnswerDiscussWorkspaceReportSaveEasy
18The Fourier series represents a periodic signal as:AA sum of sinusoids at multiples of the fundamental frequencyBA step functionCA single impulseDA polynomialView AnswerDiscussWorkspaceReportSaveEasy