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June 15th, 2010, 04:10 AM   #1
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Please Read! :) Math help D:

I'm really on math help cause the teacher doesn't really letting us now about it T.T I'm on the back on class and I'm just turning
1st year 8P I really have a problem about the solution set T.T

y+2<3
and I got this domain
1
1---
2

I really need help I'm really interested in math this year more than last year v.v...
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June 15th, 2010, 04:14 AM   #2
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Re: Please Read! :) Math help D:

Hello ImSanta,

It is you want to know for which y, y+2<3 is true?

Hoempa
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June 15th, 2010, 10:30 AM   #3
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Re: Please Read! :) Math help D:

Quote:
Originally Posted by ImSanta
I'm really on math help cause the teacher doesn't really letting us now about it T.T I'm on the back on class and I'm just turning
1st year 8P I really have a problem about the solution set T.T

y+2<3
and I got this domain
1
1---
2

I really need help I'm really interested in math this year more than last year v.v...

subtracting the two from both sides of the inequality gives:



If by domain the question means all possible values of y, then it would be the greatest value of y is the repeating decimal:

GREATEST

and the least possible value is negative infinity, since y only has to be less than 1. This could be the wrong answer if the domain in question is not the one I explained in my first sentence, I was not certain what is meant by domain. My apologies
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June 15th, 2010, 12:51 PM   #4
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Hi ImSanta, it seems you used division instead of subtraction. The domain could be given as {y|y < 1} or in certain other ways. Perhaps you've been taught to use some specific notation.
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June 15th, 2010, 01:39 PM   #5
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Re: Please Read! :) Math help D:

mfetch22, you should note that the repeating decimal 0.9999... is actually equal to 1, and so does not lie in the set This set has no greatest element - for any there is an element with
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June 15th, 2010, 01:59 PM   #6
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Re: Please Read! :) Math help D:

Quote:
Originally Posted by mattpi
mfetch22, you should note that the repeating decimal 0.9999... is actually equal to 1, and so does not lie in the set This set has no greatest element - for any there is an element with
Thank you mattpi, I should have realized such a mistake. Set Theory is a much better manner in which to describe the bounds of this inequality, rather then attempting to slap a value on the maximum like I did. Good call, my mistake, thanks for catching it.
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