Math Problem Statement

Given that real numbers a, b, c satisfy abc = -1 and a + b + c = 4, find the value of a^2 + b^2 + c^2 using the equation: a / (a^2 - 3a - 1) + b / (b^2 - 3b - 1) + c / (c^2 - 3c - 1) = 4/9.

Solution

The problem states that real numbers aa, bb, and cc satisfy the conditions:

abc=1,a+b+c=4abc = -1, \quad a + b + c = 4

It asks to find a2+b2+c2a^2 + b^2 + c^2 based on the following equation:

aa23a1+bb23b1+cc23c1=49\frac{a}{a^2 - 3a - 1} + \frac{b}{b^2 - 3b - 1} + \frac{c}{c^2 - 3c - 1} = \frac{4}{9}

Let's begin by analyzing the given information and solving for a2+b2+c2a^2 + b^2 + c^2. I'll work through the details of simplifying the equation and incorporating the conditions provided.We have the expanded form of (a+b+c)2(a + b + c)^2:

16=a2+b2+c2+2(ab+bc+ca)16 = a^2 + b^2 + c^2 + 2(ab + bc + ca)

Next, we need to express ab+bc+caab + bc + ca. By using the symmetric identities derived from the sum and product of roots in cubic equations, we'll substitute these into the equation to isolate a2+b2+c2a^2 + b^2 + c^2. Let me continue from here.The expression for ab+bc+caab + bc + ca is:

ab+bc+ca=12(a2+b2+c2)+8ab + bc + ca = -\frac{1}{2}(a^2 + b^2 + c^2) + 8

Now, we can substitute this result back into the equation 16=a2+b2+c2+2(ab+bc+ca)16 = a^2 + b^2 + c^2 + 2(ab + bc + ca) and solve for a2+b2+c2a^2 + b^2 + c^2. Let me do that next.

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Math Problem Analysis

Mathematical Concepts

Algebra
Systems of Equations
Symmetric Polynomials

Formulas

(a + b + c)^2 = a^2 + b^2 + c^2 + 2(ab + bc + ca)
abc = -1
a + b + c = 4

Theorems

Symmetric identities
Sum of roots of cubic equations

Suitable Grade Level

Grades 10-12