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I see you have a set of exercises in mathematics, focused on systems of equations, matrix operations, and parameter analysis. Here’s a breakdown of each exercise in your worksheet:

### Exercise 1
This exercise involves interpreting relationships between the number of social media followers of three friends: Soraya, Carla, and Julia. You need to:
1. Define variables for each person's followers.
2. Set up equations based on the given conditions.
3. Solve the system of equations to find the number of followers for each friend.

### Exercise 2
You have a system of linear equations with a parameter \( m \):
\[
mx + y = 1 \\
2x + my = 1 \\
x + mz = 0
\]
Tasks include:
1. Discussing the number of solutions in terms of the parameter \( m \).
2. Solving for the specific case where \( m = 1 \).

### Exercise 3
This problem is about determining how much mineral each of three mines (A, B, and C) must extract to satisfy certain material needs:
- You have percentages of Nickel (Ni), Copper (Cu), and Iron (Fe) in each mine.
- The goal is to set up a system of equations to meet a specified demand (7 tons of Nickel, 18 of Copper, and 16 of Iron).

### Exercise 4
You’re asked to work with matrices:
1. Given matrices \( A \), \( B \), and \( I \), calculate \( A - \lambda I \) and \( (A - \lambda I)^2 \).
2. Determine for what values of the parameter \( \lambda \), the condition \( A - \lambda I = B \) holds.

### Exercise 5
This exercise involves another system of linear equations with a parameter \( a \). You need to:
1. Determine the parameter values for which the system has a unique solution or infinitely many solutions.

Would you like me to solve one of these exercises in detail, or provide explanations on how to approach them?

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Here are some related questions to deepen understanding:

1. How do parameter values affect the number of solutions in a linear system?
2. How can we interpret the results of a matrix operation like \( A - \lambda I \) geometrically?
3. Why is it important to classify the type of solutions (unique, infinite, or none) in a system of equations?
4. What are some methods to solve a system of linear equations with parameters effectively?
5. How does the composition of materials affect the extraction requirements in a real-world scenario like mining?

**Tip:** For systems involving parameters, substitute specific values first to understand general behavior and then analyze conditions for uniqueness or multiplicity of solutions.

Math exercises involving systems of equations, matrix operations, and parameter analysis.

Explore step-by-step solutions to math exercises focused on systems of linear equations, matrix operations, and parameter analysis. Perfect for high school students tackling advanced algebra and matrix problems.

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