Wednesday, August 30, 2017

12 divided by 0 is x would mean that 0 times x = 12 But no value would work for x because 0 times any number is 0

Math Forum: Ask Dr. Math FAQ: Dividing by Zero

Division by zero
Division by zero is an operation for which you cannot find an answer, so it is
disallowed. You can understand why if you think about how division and
multiplication are related.
12 divided by 6 is 2   because
    6 times 2 is 12

   12 divided by 0 is x   would mean that
    0 times x = 12
But no value would work for x because 0 times any number is 0. So division by zero doesn't work.
-Doctor Robert
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that's good.  maybe that's why someone put as top answer on page (good on that person too). 
skimming other answers much less straightfwd.
cld consider, maybe some worthwhile other sense of *why* / different viewing explaining of meanings math.
~ one answer just states algebraic rules as givens.  as does this answer I like?  but this one in way that you think out (as the rule maybe not like under it but at least think along it), not just here is the associative rule, a/b=c then c(b)=a or whtvr etc, given this knowledge, then... eh.


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ah see  this Dr Rbt is good, went to look also for answer 0/0  why not just 0?  
ah but it's not only 0 it is ~ set of all numbers  ALL  well dunno if 'set' is right to say here
bcs 0/0 = x   means that x(0) = 0  true if x is 0.  but also true if x is any # !   any # times 0 is 0.  
so.  

What is the value of 0/0? (Is it really undefined or are there an infinite number of values?)
There's a special word for stuff like this, where you could conceivably give it any number of values. That word is "indeterminate." It's not the same as undefined. It essentially means that if it pops up somewhere, you don't know what its value will be in your case. For instance, if you have the limit as x->0 of x/x and of 7x/x, the expression will have a value of 1 in the first case and 7 in the second case. Indeterminate. 
- Dr. Robert
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Indeterminate.

Monday, August 21, 2017

Taking Photos Won’t Take You Out of the Moment - “actually causes you to encode visual content and remember it”

Taking Photos Won’t Take You Out of the Moment, Study Suggests - The New York Times
nytimes 2017/08/18  |  a study in this month’s issue of Psychological Science.

Researchers found that taking photos during an experience helped people remember visuals more accurately, even when they didn’t revisit their photos.
The results follow research published last year by the same group, wh found that photo-taking made people more engaged with experiences, leading them to enjoy positive events more / y! th is why I

In related experiments, participants toured virtual art galleries with the option to take onscreen snapshots. The researchers found similar gains in memory when participants were asked to take screenshots compared with conjuring mental images.

The findings suggest that the process of looking around for what to photograph “actually causes you to encode visual content and remember it”  /y!

By some estimates, people around the world will take 1.3 trillion photos this year. “It’s a thing that’s taking over our lives,” said Alix Barasch, one of the authors and an assistant professor at the New York University Stern School of Business, “yet nobody has really studied the psychological effects of taking pictures.”

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