this may as well be chinese to me, so im not sure how to be more descriptive=(

http://i.imgur.com/aVa89.jpg

I just began class today.. I have no experience with any of this and the course work does not begin to explain it.. i googled the symbol "|" it tells me that it means "divided into" that tells my feeble mind that x/x=1; and so "1 is equal to or less than -4.25" obviously false... the solution gives me -infinity..... my brain hurts.... what do?

Re: this may as well be chinese to me, so im not sure how to be more descriptive=(

ps. i took a screen cap, because i dont even know how to key in those symbols

pss. i HATE math =(

Re: this may as well be chinese to me, so im not sure how to be more descriptive=(

Quote:

Originally Posted by

**sloupok**

That set is simply $\displaystyle \left(-\infty,\frac{17}{4}\right]$.

But I can't imagine that this is what was meant. Was it?

Could it have been $\displaystyle |x|\le\frac{17}{4}~?$

Re: this may as well be chinese to me, so im not sure how to be more descriptive=(

the first set you have is the correct answer, but i still have no idea what any of it means

Re: this may as well be chinese to me, so im not sure how to be more descriptive=(

Quote:

Originally Posted by

**sloupok**

You're given this on your 1st day...by a teacher who gave no explanation? (Doh)

Re: this may as well be chinese to me, so im not sure how to be more descriptive=(

**| **means "**given that**" ...so

find set of values of x given that | .......x<=17/4

Re: this may as well be chinese to me, so im not sure how to be more descriptive=(

Quote:

Originally Posted by

**Wilmer** You're given this on your 1st day...by a teacher who gave no explanation? (Doh)

yes exactly.

i was able to complete every other question on the assignment correctly with average of 97.6; excluding the problem given in OP, the assignment was easily understood

examples:

http://i.imgur.com/z7bB1.jpg

Re: this may as well be chinese to me, so im not sure how to be more descriptive=(

Quote:

Originally Posted by

**MaxJasper** **| **means "**given that**" ...so

find set of values of x given that | .......x<=17/4

so "x is less than or equal to -4.25"?

what does the fraction -17/4 inbetween || mean?

Re: this may as well be chinese to me, so im not sure how to be more descriptive=(

|-17/4| means the ABSOLUTE VALUE or SIZE of -17/4. In other words, it's asking you how far away is -17/4 from 0?

Re: this may as well be chinese to me, so im not sure how to be more descriptive=(

No, the absolute value is a DISTANCE. You can only ever have a POSITIVE value for a distance (so it turns all numbers positive). Therefore |-17/4| = 17/4, and the set x <= |-17/4| is the same as x <= 17/4. So in interval notation your answer is (-infinity, 17/4].

Re: this may as well be chinese to me, so im not sure how to be more descriptive=(