hi, how can i work out the values of x for this inequality please, |x/(x-2)| > |1/(x+1)|
the most confusing thing is that both parts are being divided.
Hello cpjThis is an awkward, 'bitty' sort of question. You need to look first at the values of where the sign of each expression changes, and then to consider the functions in the ranges formed by these values.
So the signs change when . We consider, in turn, the four ranges . I'll do the first two, and leave you to look at the last two.
Whenand
So
I'll leave you to check that this can be reduced to
Completing the squareNow for . So we want values of for which
, since
So there's part of the solution set. (I said it was awkward!)
Now we look at the next range, .
In a similar way, we get this time:which can be reduced to
This time the denominator is negative, so we want values of for whichand clearly there are none. So there are no values of in the range .
I'll leave you to look at the last two ranges of in the same way. I reckon the final answer is .
Grandad