We are asked to solve the inequality $\frac{2}{|x-3|-1} + \frac{3}{|x-3|+2} \le 0$.

AlgebraInequalitiesAbsolute ValueRational Expressions
2025/5/26

1. Problem Description

We are asked to solve the inequality 2x31+3x3+20\frac{2}{|x-3|-1} + \frac{3}{|x-3|+2} \le 0.

2. Solution Steps

Let y=x3y = |x-3|. Then the inequality becomes
2y1+3y+20\frac{2}{y-1} + \frac{3}{y+2} \le 0.
To solve this inequality, we find a common denominator:
2(y+2)+3(y1)(y1)(y+2)0\frac{2(y+2) + 3(y-1)}{(y-1)(y+2)} \le 0
2y+4+3y3(y1)(y+2)0\frac{2y+4+3y-3}{(y-1)(y+2)} \le 0
5y+1(y1)(y+2)0\frac{5y+1}{(y-1)(y+2)} \le 0
The critical points are y=15y = -\frac{1}{5}, y=1y = 1, and y=2y = -2. Since y=x30y = |x-3| \ge 0, we can ignore y=2y = -2. Thus we analyze the sign of the expression 5y+1(y1)(y+2)\frac{5y+1}{(y-1)(y+2)} for y0y \ge 0.
If 0y<150 \le y < \frac{-1}{5}, then 5y+1<0,y1<0,y+2>05y+1<0, y-1 < 0, y+2 > 0, and 5y+1(y1)(y+2)>0\frac{5y+1}{(y-1)(y+2)} > 0. Impossible.
If 15y<1\frac{-1}{5} \le y < 1, then 5y+10,y1<0,y+2>05y+1 \ge 0, y-1 < 0, y+2 > 0, and 5y+1(y1)(y+2)0\frac{5y+1}{(y-1)(y+2)} \le 0. Thus we have 15y<1-\frac{1}{5} \le y < 1. Since y0y \ge 0, we have 0y<10 \le y < 1.
If y=1y = 1, then the first term in the original inequality is undefined.
If y>1y > 1, then 5y+1>0,y1>0,y+2>05y+1 > 0, y-1 > 0, y+2 > 0, and 5y+1(y1)(y+2)>0\frac{5y+1}{(y-1)(y+2)} > 0.
Therefore, the only possible solution is 0y<10 \le y < 1. Substituting y=x3y = |x-3|, we have 0x3<10 \le |x-3| < 1. This gives us
1<x3<1-1 < x-3 < 1.
Adding 3 to all sides, we get
2<x<42 < x < 4.

2. Final Answer

2<x<42 < x < 4

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