$\dot{x} = -x + \sin t$

Example · High school

Terms

Term	This example	Why
time invariant	✗	$\dot{x} = -x + \sin t$ is not time-invariant, because the forcing term $\sin t$ depends explicitly on $t$.
unforced	✗	$\dot{x} = -x + \sin t$ is not unforced, because the forcing term $\sin t$ depends explicitly on $t$.

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