Finding the Product Function

Oct 13, 2025 by miodeya.com 88 views

In mathematics, functions are used to describe the relationship between variables. When we have two functions, we can combine them in various ways to create new functions. In this article, we will explore the product of two functions and how to find the resulting function.

What is the Product of Two Functions?

The product of two functions is a new function that is obtained by multiplying the two original functions together. This means that for any input value x, the product function will return the result of multiplying the values of the two original functions at that input value.

Given Functions

We are given two functions:

f(x) = 2x - 8
g(x) = -5x

We need to find the product of these two functions, which is denoted as h(x) = f(x) * g(x).

Finding the Product Function

To find the product function, we simply multiply the two original functions together. This means that for any input value x, we will multiply the values of f(x) and g(x) at that input value.

Using the given functions, we can write the product function as:

h(x) = f(x) * g(x) = (2x - 8) * (-5x)

To simplify this expression, we can use the distributive property of multiplication over addition. This means that we can multiply each term in the first expression by each term in the second expression.

h(x) = (2x - 8) * (-5x) = -10x^2 + 40x

Therefore, the product function is:

h(x) = -10x^2 + 40x

Answer Options

Now that we have found the product function, we can compare it to the answer options.

A. h(x) = 10x^2 - 40x: This is not the correct answer, as the product function has a negative coefficient for the x^2 term.
B. h(x) = -10x^2 + 40x: This is the correct answer, as it matches the product function we found.
C. h(x) = -10x + 40: This is not the correct answer, as it does not match the product function we found.

Conclusion

In the previous article, we explored the product of two functions and how to find the resulting function. In this article, we will answer some common questions related to the product of two functions.

Q: What is the product of two functions?

A: The product of two functions is a new function that is obtained by multiplying the two original functions together. This means that for any input value x, the product function will return the result of multiplying the values of the two original functions at that input value.

Q: How do I find the product of two functions?

A: To find the product of two functions, you simply multiply the two original functions together. This means that for any input value x, you will multiply the values of the two original functions at that input value.

Q: What if the two functions have different variables?

A: If the two functions have different variables, you will need to substitute the variables in one function with the corresponding values from the other function. For example, if you have two functions f(x) and g(y), you will need to substitute y with x in the function g(y) before multiplying the two functions together.

Q: Can I use the product of two functions to find the sum or difference of the two functions?

A: No, the product of two functions is not the same as the sum or difference of the two functions. The product of two functions is a new function that is obtained by multiplying the two original functions together, whereas the sum or difference of two functions is a new function that is obtained by adding or subtracting the two original functions.

Q: What are some common applications of the product of two functions?

A: The product of two functions has many common applications in mathematics and science. Some examples include:

Physics: The product of two functions is used to describe the motion of objects in physics. For example, the product of the position function and the velocity function can be used to describe the acceleration of an object.
Engineering: The product of two functions is used to describe the behavior of complex systems in engineering. For example, the product of the input function and the transfer function can be used to describe the output of a system.
Economics: The product of two functions is used to describe the behavior of economic systems. For example, the product of the supply function and the demand function can be used to describe the equilibrium price of a good.

Q: How do I graph the product of two functions?

A: To graph the product of two functions, you can use the following steps:

Graph the two original functions: First, graph the two original functions on the same coordinate plane.
Find the product function: Next, find the product function by multiplying the two original functions together.
Graph the product function: Finally, graph the product function on the same coordinate plane as the two original functions.

Q: What are some common mistakes to avoid when finding the product of two functions?

A: Some common mistakes to avoid when finding the product of two functions include:

Forgetting to distribute the multiplication: Make sure to distribute the multiplication over addition when finding the product of two functions.
Not using the correct order of operations: Make sure to use the correct order of operations when finding the product of two functions.
Not checking the units: Make sure to check the units of the product function to ensure that they are correct.

Conclusion

In this article, we answered some common questions related to the product of two functions. We covered topics such as how to find the product of two functions, how to graph the product of two functions, and common mistakes to avoid when finding the product of two functions. By following these tips and techniques, you can become more confident and proficient in finding the product of two functions.