Understanding the Function F(x, y, z) = 11x²y² + 5z²
In this article, we will explore how to evaluate the function F(x, y, z) = 11x²y² + 5z² at specific coordinate points. This task involves substituting given values for x, y, and z into the function and simplifying the expression step-by-step. Our primary goal is to compute F(0, 4, 5) and express the solution in the symbolic form ( , , ) — that is, as an ordered triple.
Step-by-Step Approach to Calculating F(0, 4, 5)
Understanding the Function and Its Components
The function F(x, y, z) = 11x²y² + 5z² consists of two main terms:
- 11x²y²: a product of squared variables x and y, scaled by 11
- 5z²: the square of z, scaled by 5
To evaluate this function at a specific point, we need to substitute the corresponding values of x, y, and z and perform the calculations accordingly.
Substituting the Values (0, 4, 5) into the Function
Step 1: Substitute x = 0, y = 4, z = 5
Replacing variables with their respective values gives:
F(0, 4, 5) = 11 (0)² (4)² + 5 (5)²
Step 2: Simplify each term separately
- First term: 11 0² 4²
- Second term: 5 5²
Calculating each component:
- 0² = 0
- 4² = 16
- 5² = 25
Step 3: Plug in the simplified values
F(0, 4, 5) = 11 0 16 + 5 25
Step 4: Perform the multiplications
- 11 0 16 = 0
- 5 25 = 125
Step 5: Add the results
F(0, 4, 5) = 0 + 125 = 125
Expressing the Solution as an Ordered Triple
The problem statement requests the solution in the symbolic form ( , , ), which represents the point in space where the function is evaluated. Since the function's input is (x, y, z) and the output is a scalar, the ordered triple notation is used to represent the input point.
Therefore, the answer is:
(0, 4, 5)
Summary of the Calculation Process
Here's a quick summary of the steps involved:
- Identify the function and the point of evaluation.
- Substitute the given values into the function.
- Simplify each term separately.
- Calculate each squared term.
- Perform the multiplications and addition.
- Express the input point as an ordered triple ( , , ).
Additional Tips for Evaluating Multivariable Functions
1. Always double-check substitutions
Errors often occur during substitution, especially with signs or powers. Double-check each step to ensure accuracy.
2. Simplify step-wise
Break down complex expressions into smaller parts, simplifying each step to avoid mistakes.
3. Use parentheses to clarify order of operations
When writing expressions, parentheses help clarify the sequence of calculations, especially in nested operations.
4. Practice with different functions
Evaluating various functions enhances understanding and speed, especially when working with more complex expressions.
Conclusion
Calculating the value of a multivariable function at a given point involves systematic substitution and simplification. In our example, we evaluated F(0, 4, 5) by substituting the point's coordinates into the function and simplifying step-by-step, resulting in the value 125. The input point, expressed as an ordered triple, is (0, 4, 5), which accurately reflects the variables' values used in the calculation.
Mastering this process is essential for students and professionals working in calculus, physics, engineering, and related fields, where functions of multiple variables are commonplace. With practice, evaluating such functions becomes quick and intuitive, allowing for efficient analysis of complex systems and models.