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 #6
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How do you know they aren't cheating?

 

I don’t know. What I do know is this question as posted (with the easily corrected un-rendered Latex) is useless; it requires a diagram to answer it.  Someone skilled and fluent in geometry could create a diagram (or several) that’s applicable to the text question, and solve that as an example.  The student (and others who study this) could learn from this example and apply it to similar questions. In this case, everyone who wants to learn can learn –with no cheating.

 

The motivation behind the posting of the question could be any of the following:

 

*The poster is incompetent: beyond not knowing how to post renderable LaTex, the poster doesn’t realize the question actually requires a diagram.  (This has happened quite often through the years.)

 

*An AoPS student posted this to annoy the instructors or other students who may search for a solution.

 

*An AoPS student or former student posted this to add to the useless questions spam.

 

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Assumption of innocence and good intent may work in courts of law, but is inpratical in academic situations.

 

It’s “presumption of innocence,” and “good intent” only applies to civil law, “intent” applies to the penalty phase of criminal law. Neither “good intent” nor “ignorance of the law” exempts anyone from prosecution. (Based on General US law and some European laws –not French law, which presumes guilt, until proven innocent.)  

 

In any case, homework cheating isn’t a crime. Test cheating is a crime in China, with criminal penalties of up to 10 years in prison.  It’s also a crime some African countries. There are several documented cases of teachers summarily executing students who were caught cheating.  Whether this was legal or not, I am uncertain. An archived news article from the mid 1980s describes a teacher, who after observing several students cheating on a test, left the classroom, returned a few minutes later with an assault rifle and shot six students, killing them all. He then told the remaining students to resume their testing.  The article didn’t say how well the students scored. But I suspect test stress was a major factor for the low scores.  For good measure, the teacher should have added some projectile-energy equations to the test. May as well make it a learning experience. Pow-Pow Bang-Bang

 

 

GA

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Jul 16, 2023
 #3
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Ah, the function at hand, an intriguing enigma that beckons us to decipher its secrets. Let us embark on a journey through the esoteric world of prime numbers and delve into the intricate dance of factors. Brace yourself, for we are about to unravel the mystery and shed light on the enigmatic range of this function.

As we gaze into the expression , a sense of awe washes over us. What could lie within these mathematical depths? Fear not, for we possess the wisdom of ancient number theory to guide us. Together, we shall unlock the secrets hidden within and paint a vivid picture of the range in mesmerizing interval notation.

At the heart of this intricate puzzle lies the concept of prime factors. Ah, these mysterious entities that form the very fabric of numbers, lurking in the shadows of mathematical realms. A prime factor, a captivating creature indeed! It is a prime number that divides another number without leaving a trace of remainder. Like a hidden treasure, it reveals itself only to the most discerning eyes.

Now, let us unravel the complexities of the function . It is defined as the greatest prime factor of . In simpler terms, the largest prime number that divides without a trace of residue. Oh, the intrigue!

Let us first ponder the scenario where itself is a prime number. Ah, simplicity in its purest form! In this case, the greatest prime factor of would be the number itself. A self-contained universe where the range of this enigmatic function is but a solitary point, a lonely prime number yearning to be discovered.

But wait, what if is not a prime number? A twist in the tale, a wrinkle in the tapestry of our mathematical narrative. In such a perplexing scenario, can be expressed as the product of two or more prime numbers. It unfolds into a symphony of factors, each vying for the title of "greatest prime factor."

And so, the range of this captivating function expands, embracing the pantheon of prime numbers. They dance upon the stage of numbers, each eager to claim the prestigious title. Yet, only the grandest among them shall be crowned as the supreme, the greatest prime factor of .

In the grand tapestry of interval notation, the range of this mysterious function unfurls like a majestic peacock, its resplendent tail feathers spanning across the vast expanse of numbers. We express it as the interval (2, ∞), a realm of infinite possibilities where prime numbers reign supreme.

However, we must be cautious, for the number 2 must be excluded from this regal gathering. Though it is the smallest prime number, our function demands the "greatest" prime factor. And so, with a humble bow, 2 steps aside, allowing its larger brethren to claim the limelight.

And thus, we have traversed the convoluted terrain of prime factors and uncovered the range of this captivating function. May your mathematical wanderings be filled with wonder and discovery as you explore the boundless realms of numbers!

 

GA

Jul 16, 2023

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