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If 5<x+3<7 does this imply x+3<7 ? 
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#1
Feb708, 10:17 AM

P: 167

If 5<x+3<7 does this imply x+3<7 ??



#2
Feb708, 10:27 AM

P: 1,633

7<x+3<7, which means that 10<x<4 now you have 5<x+3<7 which means that 2< x<4, so what do u think now? 


#3
Feb708, 10:36 AM

P: 1,633

also, i do not think it is right to say 5<x+3<7, implies x+3<7, but rather when the first holds true, also the second will hold true. the vice versa does not hold true.



#4
Feb708, 10:37 AM

P: 167

If 5<x+3<7 does this imply x+3<7 ?
I know its just my analysis notes that subject is so weird the lecturer writes things down that don't make sense and then looks at you like you've got ten heads when you question it. Weird subject man



#5
Feb708, 10:38 AM

P: 167

"also, i do not think it is right to say 5<x+3<7, implies x+3<7, but rather when the first holds true, also the second will hold true. the vice versa does not hold true."
Thanks i think 


#6
Feb708, 10:42 AM

P: 167

Also if x3 < A/x+3 we need to bound x+3 right?
Now if you take 2/3xx1/2 < A why do we bound 2/3x and not 3x/2 ? 


#7
Feb708, 11:15 AM

Math
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PF Gold
P: 39,552

If 5< x+ 3< 7 then it is certainly true that 7< x+ 3< 7 so x+3< 7. 


#8
Feb708, 11:46 AM

P: 461




#9
Feb708, 12:22 PM

Math
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#10
Feb708, 02:45 PM

P: 1,633




#11
Feb708, 03:22 PM

P: 167




#12
Feb708, 04:26 PM

P: 107

well if x is greater than two it's certainly greater than 10...



#13
Feb708, 04:34 PM

Math
Emeritus
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Thanks
PF Gold
P: 39,552




#14
Feb708, 04:36 PM

Math
Emeritus
Sci Advisor
Thanks
PF Gold
P: 39,552




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