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05302013, 10:44 AM  #1 
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Math Confusion
1) X = .99999...
2) 10X = 9.99999... Subtract 1) from 2) 9X = 9 and X =1. So .9999.... = 1 and all is good. 1) Q = 1 + 2 + 4 + 8......... 2) Q = 1 + 2(1 + 2 + 4 + 8.........) Group terms 3) Q = 1 + 2Q Substitute 1) in 2) Solve for Q: 4) Q = 1 and then 1 = Q = 1 + 2 + 4 + 8......... How can 1 = 1 + 2 + 4 + 8......... ???? 
05302013, 11:03 AM  #2 
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I've never really understood a person's Q score is calculated either.
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05302013, 11:05 AM  #3 
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Because an infinite geometric series like Q does not converge unless the absolute value of the common ratio is less than 1. So Q does not exist in the mathematical sense, and its value is infinity.

05302013, 11:25 AM  #4 
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Because there is little value in math, translated to real life, unless you plan to be an accountant.

05302013, 11:35 AM  #5  
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Quote:
You ruined all the fun. Not rigorous way. If 1) Q = infinity 2) Q + 1 = infinity Subtract 1) from 2) then 1 = 0 Q (infinity) is not a specific number like 400 for example or like you say does not converge to a specific number. 

05302013, 11:36 AM  #6 
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05302013, 11:37 AM  #7 
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05302013, 11:46 AM  #8 
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I'm a poser and a wannabe but still probably better than you. 
05302013, 12:05 PM  #9 
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Figuring out your bank account is not advanced calculus, but rather simple addition and subtraction. That's 6 grade stuff, not university advanced math.
Besides, the banks do it for you, and figure in their percentage while doing so.... 
05302013, 02:18 PM  #10 
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Most of use won't use calculus in our daily jobs, but then again do we really use anything we learned in grade school/college?

05312013, 07:08 PM  #11 
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Maybe you don't use math in the way you do it on a math test? But having an understanding of math seems to matter. I read of a study that showed that people who could understand ideas like compound interest retired with much more $$ than did people who were ignorant of them.

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06012013, 07:53 AM  #12 
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Accounting has nothing to do with math.
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06022013, 02:03 AM  #13 
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You pretty much only use Calculus when looking at graphs and want to figure out the amount of something under the curve or above the curve. After 3 years of undergrad research in Chemistry I can honestly say I've used Calculus a handful of times for my research papers. It's kind of a sad thing to admit......

06022013, 02:43 AM  #14 
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Talker, there is some real confusion with what you have 'assumed' not with maths as such. I would assume some lecturer has given these to you as a teaser, and its worked

06022013, 08:17 AM  #15 
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What's wrong with the following?
Let "L" be the largest real number. then surely 1) L >= 1 Since no real number can be larger than L, L >= L^2 Divide each side by L, and 2) 1 >= L Combining 1) and 2)...1>= L >= 1, so L must = 1 The largest real number is 1. What's going on here? 
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06022013, 09:51 AM  #16 
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06022013, 09:51 AM  #17 
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Eddy is back! Need to read his post and try to understand it.

06022013, 11:32 AM  #18 
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Math and philosophy can be closely related.
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06022013, 04:06 PM  #19 
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06022013, 04:09 PM  #20  
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Quote:


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