1. Engineering
2. Electrical Engineering
3. sometimes i see the power of a signal written as...

# Question: sometimes i see the power of a signal written as...

###### Question details

Sometimes I see the power of a signal written as above. Other times I see it written as . Are they two equations equal? Also, what about when the limits are from zero to T? Are all three the same? When can you use limits 0 to T?