xPand the quotient Fractionms. 4x x-6x 6 (x-1)²(x²+)

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Chapter1: Functions And Models
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Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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### Mathematical Exercise: Expanding Quotients Using Fractions

In this exercise, we will learn how to expand the given quotient using fractions. The problem presented is:

\[ \frac{4x^3 - 6x^2 + 6x}{(x-1)^2 (x+1)} \]

The objective here is to expand the given fraction, making the polynomial in the numerator more manageable by expressing it as partial fractions. This process involves breaking down a complex fraction into a sum of simpler fractions that are easier to work with, especially for integration or solving equations.

Let's walk through the steps for expanding this quotient:

1. **Factorize the Denominator:**
   The denominator \((x-1)^2 (x+1)\) is already in factored form. This makes the next steps of finding partial fractions straightforward.

2. **Set up Partial Fractions:**
   We express the given fraction as a sum of partial fractions:
   \[ \frac{4x^3 - 6x^2 + 6x}{(x-1)^2 (x+1)} = \frac{A}{x-1} + \frac{B}{(x-1)^2} + \frac{C}{x+1} \]

3. **Determine the Coefficients (A, B, and C):**
   To find the values of A, B, and C, we must clear the denominators by multiplying through by \((x-1)^2 (x+1)\) and then solve for A, B, and C by equating the corresponding coefficients on both sides of the equation.

The detailed steps to find these coefficients involve algebraic manipulation and solving systems of equations, which can be an excellent exercise to understand polynomial operations and partial fractions better.

#### Tips for Students:

- Ensure you are comfortable with polynomial long division and factorization.
- Practice solving simultaneous equations as this technique is pivotal in finding values for the coefficients.
- Always recheck your work by combining your partial fractions to see if you get back the original fraction.

Understanding this process aids in simplifying complex rational expressions and is a vital skill in various advanced mathematical fields, including calculus and engineering mathematics.
Transcribed Image Text:### Mathematical Exercise: Expanding Quotients Using Fractions In this exercise, we will learn how to expand the given quotient using fractions. The problem presented is: \[ \frac{4x^3 - 6x^2 + 6x}{(x-1)^2 (x+1)} \] The objective here is to expand the given fraction, making the polynomial in the numerator more manageable by expressing it as partial fractions. This process involves breaking down a complex fraction into a sum of simpler fractions that are easier to work with, especially for integration or solving equations. Let's walk through the steps for expanding this quotient: 1. **Factorize the Denominator:** The denominator \((x-1)^2 (x+1)\) is already in factored form. This makes the next steps of finding partial fractions straightforward. 2. **Set up Partial Fractions:** We express the given fraction as a sum of partial fractions: \[ \frac{4x^3 - 6x^2 + 6x}{(x-1)^2 (x+1)} = \frac{A}{x-1} + \frac{B}{(x-1)^2} + \frac{C}{x+1} \] 3. **Determine the Coefficients (A, B, and C):** To find the values of A, B, and C, we must clear the denominators by multiplying through by \((x-1)^2 (x+1)\) and then solve for A, B, and C by equating the corresponding coefficients on both sides of the equation. The detailed steps to find these coefficients involve algebraic manipulation and solving systems of equations, which can be an excellent exercise to understand polynomial operations and partial fractions better. #### Tips for Students: - Ensure you are comfortable with polynomial long division and factorization. - Practice solving simultaneous equations as this technique is pivotal in finding values for the coefficients. - Always recheck your work by combining your partial fractions to see if you get back the original fraction. Understanding this process aids in simplifying complex rational expressions and is a vital skill in various advanced mathematical fields, including calculus and engineering mathematics.
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