Unit step function

  • Thread starter amaresh92
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  • #1
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what does the u(-t) mean in unit step funtion in basic function of signal and system?how can be time taken as -ve?
 

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  • #2
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u(t) is unit step function right? It means that u=1 for t>=0 and u=0 otherwise.
In the same way u(-t) can be understood. That is u=1 for t<=0 and u=0 otherwise.
Here time is not taken as -ve but only the argument to u is taken as -ve.
 

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