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The image contains mathematical questions involving systems of linear equations and differentiation problems. I'll break down the questions visible in the image for better clarity:

1. **Question 2(b)**:
   Solve the following system of linear equations using matrices and Cramer's Rule:
   \[
   2x - y + z = 4
   \]
   \[
   4x + 2y - 3z = 5
   \]
   \[
   3x - 4y - z = 8
   \]

2. **Question 2(i)**:
   Find \( f(x), f'(x), \) and \( f''(x) \) if:
   \[
   f(x) = \ln(x^2 + 4x + 3)
   \]

3. **Question 2(ii)**:
   Given:
   \[
   f(x) = \frac{15}{x^2 + 25x + 3}
   \]
   Find \( f'(x) \).

Would you like to start with solving the system of linear equations using Cramer's Rule or proceed with the differentiation problems? Let me know your preference!

Solve the following system of linear equations using matrices as well as Cramer's rule: 
 2x - y + z = 4 
 4x + 2y - 3z = 5 
 3x - 4y - z = 8

This guide explains how to solve a system of three linear equations using Cramer's rule and matrix operations. The system includes equations like 2x - y + z = 4, 4x + 2y - 3z = 5, and 3x - 4y - z = 8. Perfect for advanced high school or undergraduate students.

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