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amaresh92
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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?
The unit step function, denoted as u(-t), is a mathematical function that is equal to 0 for all negative values of t and 1 for all positive values of t. It is often used to model systems with a sudden change or "step" in behavior.
The notation u(-t) represents the unit step function evaluated at time t. This means that the value of the function is determined by the value of t, where it is equal to either 0 or 1 depending on the sign of t.
Negative time in the unit step function represents a time before the "step" or sudden change in behavior occurs. This allows us to model systems that have a delayed response to a stimulus or input.
The unit step function is commonly used in physics and engineering to model and analyze systems that have a sudden change in behavior or response. It is also used in signal processing to represent signals that turn on at a specific time.
The unit step function is also known as the Heaviside step function, the Heaviside function, or the rectangular function.