Question

In what condition is the sum of 2 periodic signal is periodic

Answer 1

$\underline{\large\bf{\mathfrak{ hi \: freind ! \\ \\ here \: is \: your \: answer ! }}}$


It appears to be quite irregular but in fact itrepeats every 21,252 days, since 21,252 is the least common multiple of 23, 28, and 33. (View this graph on Desmos.) Sums of periodic functions are not always periodic. If the periods of two periodic functions do not have a common multiple, then their sum is not periodic.



✅ hope It helped ✅