Posted by **joe** on Sunday, October 29, 2006 at 7:02pm.

|(x-3)/(x+5)|< 2

i've asked so many ppl, but they all give me different answers :(

Well if the expression is less than two, and the abs function is positive, then the ratio is between 0 and 2. Lets look inside the abs function, it can be negative, because the abs will make it positive.

If that is so, then...

-2 < (x-3)/(x+5)<2 multiply the expression by x+5

-2 (x+5)< (x-3) <2(x+5)

-2x -10 < x-3 < 2x +10

-10 < x-3+ 2x < 4x +10

Now, examining this part -10 < x-3+ 2x

or -7 <3x

or x > -7/3

x>-2.33333 Examining the other part.. x-3+ 2x < 4x +10

-3 < 3x +10

-13 < 3x

x > -13/3 x>- 4.3333 but both of these must occur, so x> -2.333..

Now to check it. Let x=-2, 4, and -5(it should not check on this one. Let me know if you have difficulty.

## Answer This Question

## Related Questions

- math - would this be a correct proof of the cauchy-schwartz inequality: abs=...
- calculus 2 - Justify, with a written explanation or a mathematical reasoning ...
- Absolute Value and Limits - solve for limits of 1+ and 1- for this function: (x^...
- math - Describe all the integer values of x that satisfy abs(x)is less thatn abs...
- Geometry - Show the conhecture is false by finding a counterexample... 1. The ...
- Help in math probability - I have a total of three different answers that I got ...
- Calc - This is a piecewise function on one graph: f(x)= 3, -4 <or= x <or= ...
- calc - Find the critical number(s) of f(x)= abs(2x-4) What is the derivative of ...
- math - how would this equation look: y=f(x+3) when y=f(x)= x^2 would it look ...
- Math - Simplify expression. Answers should only have positive exponents. Assume ...

More Related Questions