Simplifying the Step Function Product: Exploring u(t-2)u(t-a)

In summary, the unit step function, u(t-2)u(t-a), can be simplified to u(t-2) if a <= 2 and u(t-a) otherwise. To better understand this, consider two cases for a: a < 2 and a > 2, and sketch a graph of u(t-2) * u(t-a) for each case. When a = 2, the graph is the same as u(t-2).
  • #1
cahill8
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Homework Statement


I need this to answer a question, its not a homework question itself. Can this be simplified? u(t-2)u(t-a) where u is the unit step function.


Homework Equations


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The Attempt at a Solution


I know the answer is u(t-2) if a <= 2, u(t-a) otherwise. But is there a better way to express this?
 
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  • #2
Unit step functions are either 0 or 1, depending on the value of t. Look at two cases for a: a < 2 and a > 2, and sketch a graph of u(t - 2) * u(t - a) for each case. (If a = 2, the graph of u(t - 2) * u(t - a) looks exactly like the graph of u(t - 2).)
 

What is a step function product?

A step function product is a mathematical function that has a constant value for a certain interval and then suddenly jumps to a new value at a specific point. It is often used to model real-life situations with sudden changes, such as stock market fluctuations or population growth.

How is a step function product different from a regular product?

A regular product is a mathematical operation that multiplies two or more numbers, while a step function product is a specific type of function. A step function product has a piecewise-defined formula, meaning it is defined by different formulas for different intervals. A regular product does not have this characteristic.

What are some examples of step function products?

Some examples of step function products include the Heaviside step function, which is used in physics to model the behavior of electrical circuits, and the floor and ceiling functions, which are used in mathematics to round numbers. Other examples can be found in economics, biology, and other fields.

How do you graph a step function product?

To graph a step function product, you first need to determine the intervals where the function has a constant value. Then, plot each interval as a horizontal line at that value. Finally, mark the jump points where the function changes value with a vertical line. The resulting graph will have a series of horizontal and vertical lines.

What are the practical applications of step function products?

Step function products have many practical applications in various fields such as economics, physics, and biology. They can be used to model changes in stock prices, population growth, and even the spread of diseases. They also have applications in computer science, where they can be used to simulate processes with discrete steps.

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