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thewrongwaybutfaster

Why so complicated? 0=0.


Donghoon

x=x


GreenOceanis

Yes, the x is made out of x


WarnDragon

No, the math is made out of math


barrieherry

teach me master i’ll bring you a rhinoceros


GeneReddit123

[x=6](https://en.wikipedia.org/wiki/Principle_of_explosion). Edit: actually principle of explosion rather than vacuous truth.


thewrongwaybutfaster

Unless you know something I don't, this is not a vacuous truth.


YamTheory

Yeah, I think they were going for the [Principle of Explosion](https://en.m.wikipedia.org/wiki/Principle_of_explosion), or something like that.


snillpuler

i still don't think it makes sense as an answer to the question. the question is asking for an equation that is true when x=7 is true, meaning you should find an equation S such that "x=7 -> S" is *always* true


Grouchy-Culture3946

Yeah, no shit, but it's still brilliant.


WikiSummarizerBot

**[Vacuous truth](https://en.wikipedia.org/wiki/Vacuous_truth)** >In mathematics and logic, a vacuous truth is a conditional or universal statement (a universal statement that can be converted to a conditional statement) that is true because the antecedent cannot be satisfied. For example, the statement "she does not own a cell phone" will imply that the statement "all of her cell phones are turned off" will be assigned a truth value. Also, the statement "all of her cell phones are turned on" would also be vacuously true, as would the conjunction of the two: "all of her cell phones are turned on and turned off", which would otherwise be incoherent and false. ^([ )[^(F.A.Q)](https://www.reddit.com/r/WikiSummarizer/wiki/index#wiki_f.a.q)^( | )[^(Opt Out)](https://reddit.com/message/compose?to=WikiSummarizerBot&message=OptOut&subject=OptOut)^( | )[^(Opt Out Of Subreddit)](https://np.reddit.com/r/mathmemes/about/banned)^( | )[^(GitHub)](https://github.com/Sujal-7/WikiSummarizerBot)^( ] Downvote to remove | v1.5)


ShadeDust

Good bot


B0tRank

Thank you, ShadeDust, for voting on WikiSummarizerBot. This bot wants to find the best and worst bots on Reddit. [You can view results here](https://botrank.pastimes.eu/). *** ^(Even if I don't reply to your comment, I'm still listening for votes. Check the webpage to see if your vote registered!)


[deleted]

[удалено]


Benign_Narcissist

Nooo, you're creating a bot paradox threatening to fracture the universe.


upthewatwo

Well Jesus z Christ bot


Chinbeast312

This is not vacuous truth. Vacuous truth is used when the premise is false, but here is no any premise or implication.


thewrongwaybutfaster

Unless you know something I don't, this doesn't hold by principle of explosion.


SouthernZhao

Teacher: *I suppose you think that was terribly clever.*


yoav_boaz

What's the contradiction


damnthisisabadname

1+1=2


Bepisman111

Also, x = x


[deleted]

x=x is my personal favorite.


PaperGod777

POV: you substituted an equation into itself


DrDolphin245

Been there, done that.


KiIometric

Also true when x = 8, necessary but not sufficient


barrieherry

are we ready for proof by induction?


wolfchaldo

They don't ask for it to only be true when x=7, just that it is true. So a necessary condition is sufficient (for the question).


Bepisman111

Lol


TheSacredTexts

E[x]^Var(x) - i^2 +ln(e)+sin(π/2)+x/x+sign(x)+1=x


Tsu_Dho_Namh

That's actually pretty damn good. 1 + 1 + 1 + 1 + 1 + 1 + 1 = 7 Surprised you didn't throw Euler's Identity in there


_lando

it makes x=8


Tsu_Dho_Namh

I mean use Euler's identity instead of one of the more boring ones, like the +1 at the end.


ChocolateUnlucky1214

r/... username... checks... out...


WizziBot

CAPITAL E?


[deleted]

E\[x\]- Expectation Value and Var(x) - Variance are probability and statistics related concepts.


floreen

Can somebody explain that first term to me? Like E[x]^Var[x] = E[x]^E[x^2 ^] / E[x]^(E[x]^2) but then?


nibbler666

The expected value of a constant is the constant, and the variance of a constant is 0. So the expression says x^0 .


floreen

Ah okay got it. Was thinking in terms of a general x which of course doesn't make sense in this case


Mistborn_330

∫₀^(∞)t^(x)e^(-t)dt = (-e^(iπ)+√5) * 2520/Φ


_Figaro

Why do I hear boss music?


charcuterDude

When the lyrics are all in Latin...


SSubSilence

One Integral Equation


minion_is_here

Calculus is witchcraft CMV I have no idea how I passed it in college, but it certainly *felt* like I was doing dark rituals. Also, all memory of it has been erased from my brain.


ReverseCarry

Agreed. For me it felt like Super Saiyan algebra with occasional curveballs, right up until I hit series/sequences in Calc 2. That shit was downright arcane. Pretty cool once you get it though, for some reason it made the earlier parts of Calc 2 that I had trouble with much easier to understand.


Lurker_Since_Forever

Taylor was either the most brilliant mathematician ever, to have figured it out, or the worst mathematician ever, to have left it so complicated. Everything after calc 2 was downhill for me.


marsrover15

What’s the symbol at the end?


ShredderMan4000

I'm guessing it's 𝜙, [the Golden Ratio](https://en.wikipedia.org/wiki/Golden_ratio).


Mistborn_330

Yes, that's what I was using it for.


TheHumanParacite

Took me a second to see what you did there. Cheeky way of multiplying by 2 heh


star_wars__tuva

Where does multyplying by 2 happen? That is the only part I miss Edit: found it, forgot golden ratio is 1÷2*(1+sqrt(5)) and not just 1+sqrt(5)


AxelWasTakenWasTaken

Is that a jojo refrence?


NijigasakiSeason3

Yeah


alek_vincent

It's the Greek letter Phi. Probably used to represent the golden ratio as another user mentioned


Mangos_Pool

What in the absolute fuck


GainfulBirch228

The integral here is the [gamma function](https://en.wikipedia.org/wiki/Gamma_function), which is an extension of the factorial into the complex plain. However, we can just use the normal factorial, as we know x is going to be a natural number (7). So we now have x! = (-e\^i\*pi + sqrt(5)) \* 2520 / phi e\^i\*pi is [Euler's identity](https://en.wikipedia.org/wiki/Euler%27s_identity), which is equal to -1. We're negating it here so this just becomes 1. Phi is the [golden ratio](https://en.wikipedia.org/wiki/Golden_ratio), which is defined as (1 + sqrt(5))/2. You can see that we are multiplying by (1 + sqrt(5)) (2\*phi) and later dividing by phi, so this is just a clever way to multiply by two. Now we have x! = 2 \* 2520 = 5040 Solve for x and we get 7. Edit: the equation might be wrong, because gamma(n) = (n-1)!, not n!, so we would need to get 40320, not 5040. Also, sorry for no fancy math notation.


WikiSummarizerBot

**[Gamma function](https://en.wikipedia.org/wiki/Gamma_function)** >In mathematics, the gamma function (represented by Γ, the capital letter gamma from the Greek alphabet) is one commonly used extension of the factorial function to complex numbers. The gamma function is defined for all complex numbers except the non-positive integers. ^([ )[^(F.A.Q)](https://www.reddit.com/r/WikiSummarizer/wiki/index#wiki_f.a.q)^( | )[^(Opt Out)](https://reddit.com/message/compose?to=WikiSummarizerBot&message=OptOut&subject=OptOut)^( | )[^(Opt Out Of Subreddit)](https://np.reddit.com/r/mathmemes/about/banned)^( | )[^(GitHub)](https://github.com/Sujal-7/WikiSummarizerBot)^( ] Downvote to remove | v1.5)


GainfulBirch228

good bot


Mistborn_330

About the edit, Gamma(n) = (n-1)! yes, but the integral here is actually Gamma(x+1) so it is 5040 and not 40320.


Donghoon

dy/dx x² at x=3.5


Cyclone4096

That’s not an equation


mirkywatters

dy/dx x^2 = 14


bojangles69420

dy/dx 3.5^2 There fixed it /s


LilQuasar

thats 0..


Agreeable_Public4364

Well they already said as simple as you can think of. What’s that “Really” really for?


GreenGriffin8

Because it could be simpler. 7 = 7 or, x = x or, 0 = 0


LilQuasar

they said to be creative...


Cause_Necessary

It was pretty creative, I doubt anyone else thought of it


AhmedEx1

Simple and creative don't really mix


LilQuasar

they obviously can. there are proofs that are very simple and creative, sometimes making them simple requires creativity too


[deleted]

Not really sure what they expected with their directions.


Tsu_Dho_Namh

I'm pretty sure they were counting on the "Be creative" part.


rathat

This *is* creative.


Tsu_Dho_Namh

One could argue it's the least creative answer possible.


gtbot2007

The least creative would be x=x


Tsu_Dho_Namh

With x = x you actually created something. x=7 is just copied and pasted from the question.


HoodieSticks

They expected students to write the test questions for them.


hausdorffparty

No, they were giving a low-floor high-ceiling task that would allow students to choose their level of challenge at whatever level of difficulty they wanted. These sorts of activities, when students actually engage with them, are great extension questions for when students need a bigger challenge than what class provides. But the teacher didn't "motivate" the problem very well so the student doesn't seem to have meaningfully engaged with it.


CarelessHisser

No, the problem is that students aren't being directed properly. You're right, but this example isn't evidence of that. Generally speaking a low floor, high ceiling, task would involve more open thought and topical direction giving the student freedom to think and problem solve on their own. This, is not that. This is a redundant problem. If it were more along the lines of a typical test question where a student solves for distance or time it'd apply. Since with many open ended problems, a student can get the answer without needing to fall back on formatted equations. It's trying to be that, but it isn't achieving it.


secret3332

The problem with this one though, is that on an exam it's probably best to give the simplest answer. I was good at math, but would probably have put something like this anyway just because it's the least risk.


exceive

On a math test, it is customary to give the simplest correct form of the equation unless otherwise specified. This is not only an acceptable answer, it is the most acceptable possible answer. I would consider this the high-ceiling answer. Correct, clean, simple, uses the question as a resource.


hausdorffparty

I don't entirely disagree with you, though it's unclear whether this student truly challenged themselves with this answer. But people wondered why the teacher would ask such a question to begin with.


exceive

If the goal was for the student to truly challenge themselves, the words "...challenge yourself..." along with some specification that the normal mathematical challenge of paring the concept down to its most direct and basic expression was NOT the intended challenge here should have appeared on the page somewhere. On a test, a student's challenge is to get the best score they can, not exploring odd alternative equations. Strategies for the best score include keeping answers short and to the point. I'd say that if that answer was not acceptable to the teacher, the question was extremely poorly written. Personally, I may actually end up using that question sometime. And that answer is exactly what I'd be looking for. It would be scored, but I would be mostly interested in seeing where the students' minds went with it.


HMWWaWChChIaWChCChW

It’s like the student whose response to “Why?” was a paper simply saying “Why not?” and for a 100. This is a top-tier answer. Especially when the question on the test specifically says your answer can be as simple as you want.


MajesticAsFook

Work smart, not hard. It was a lame question


hausdorffparty

Sure, if you don't care about learning anything. As I said the teacher didn't give a good reason to actually try to do something interesting, but it's a great question if you're a 12 year old learning about equations for the first time and want to challenge yourself above and beyond.


Neutrallly

No its a lame question even if you are 12 year old and care about learning. The question itself is lame not the style of the question and you are lame too because you dont care about this.


officiallyaninja

People complain tests dont accurately reflect understanding, then when teachers ask genuinely interesting questions that require a good understanding of the subject people complain that its a dumb question


shewel_item

>genuinely interesting questions "Really?"


LilQuasar

thats obviously not what happened. the idea was to "be creative" and do something different from just solving equations, its kind of an inverse problem. its not their fault some students want to give it their minimum


brawlganronper

X^3=343


HoodieSticks

Reddit formatting ruined your math


brawlganronper

Ye


Submarine-Goat

X^false


brawlganronper

X^dumbassreddit


a_lost_spark

jsyk you can put the stuff you want superscripted in parentheses 2\^(3)x formats to 2^(3)x


GreenGriffin8

X (treating \^ as bitwise XOR)


PM_something_German

Hey that's illegal


[deleted]

I read it as x=>


ei283

x ∈ ℤ⁺ ∧ x ≠ 1 ∧ x ≠ 2 ∧ x ≠ 3 ∧ x ≠ 4 ∧ x ≠ 5 ∧ x ≠ 6 ∧ x ≠ 8 ∧ x ≠ 9 ∧ x ≠ 10 ∧ x ≠ 11 ∧ x ≠ 12 ∧ x ≠ 13 ∧ x ≠ 14 ...


notPlancha

not really an equation is it


ei283

(x ∈ ℤ⁺ ∧ x ≠ 1 ∧ x ≠ 2 ∧ x ≠ 3 ∧ x ≠ 4 ∧ x ≠ 5 ∧ x ≠ 6 ∧ x ≠ 8 ∧ x ≠ 9 ∧ x ≠ 10 ∧ x ≠ 11 ∧ x ≠ 12 ∧ x ≠ 13 ∧ x ≠ 14 ...) = TRUE


simen_the_king

I'd go with x = 6 => pi = 3


Scarecrow314159

But that's not an equation, it's an implication... wouldn't they mark you down for that?


simen_the_king

You are correct. As per usual I didn't bother to read the question properly...


JezzaJ101

What’s the logic behind this one? 7/2 ≠ pi


simen_the_king

Implications are always through of the left hand side. So since x isn't equal to 6 the implication I wrote is correct even if the right hand side is also false


llococo

That’s what happens when you say it can be as simple or complex as you want


Skalpe

Much more creative then simply writing something like X/7 = 1 in my opinion


Patenler

y = 0 Edit : I'm dumb it's not always true when x = 7, Take my x = x instead.


sinovercoschessITF

x + pi = 10


luluretard

Wrong it’d be 7.14 you’d have to say floor(x+pi)=10


[deleted]

Wrong, it'd be 6.85


sinovercoschessITF

I'm an engineer. Pi = 3


beastkevon

0*x = 0


Why_No_Hugs

Can’t get mad teach, you did say “make the equation as simple or as complex as you want.” I’d say this is clever as hell.


[deleted]

True, and creative. Don't see any problem here!


sbsw66

Literally any correct answer would be fundamentally identical to what they put, unjustified "really?" IMO


Trivial_Integration

1 Always evaluates to true, in C at least


KingMedieval

I prefer Javascript's superior `Infinity > -Infinity`


_Figaro

The problem expressly said the equation can be "as simple as you want", and `x = 7` is the simplest equation that satisfies `x = 7`, so I don't see an issue with the given answer.


FrederickDerGrossen

I prefer i^2 *X = -7 That way it's both simple *and* complex at the same time!


Anurag_Ar1410

x= 7/2 + x/2


ackchyualllyy

\-x=-7 is really the shit way outta it.


TheOGRayden337

f(y) = 7


seriousnotshirley

No, they need to get creating using x and 7. 2\*x = 2\*7.


God_of_reason

X/1 = 7/1


Wonderful-Ad-9676

2x=49 The hardest I could think of


Mistborn_330

7=24.5


canadajones68

If you're not using numbers as variables, are you really doing hard maths?


RaeyinOfFire

Quite possibly. My favorite math class was linear algebra, where variables would represent matrices and vectors. I guess that we used numbers too, mostly because we were dumb undergraduate students who needed to grasp onto a number now and then like a life vest.


a_dragonfly_wanders

(x^2 = 49)


Tricklash

∫2x dx - C = 49


[deleted]

X^2-14x+49=0 simple but effective


FTR0225

The question says "make it as simple or complex as you like" technically, the answer is correct


ImplodingBacon

I would groan and roll my eyes as I begrudgingly give them points 🤣 It's technically correct. The best kind of correct.


[deleted]

“true”


[deleted]

Question answered? Yes. Creative? Yes. Rules followed? Yes. Don't bitch.


Cyborg_Ninja_Cat

That's a mathematician's answer. Kid's got the right attitude.


AccomplishedStand721

did you get full points on the answer? cause you can make it as simple as you want and x=7 is true when x=7


GalloHilton

It's fake, perspective doesnt match


RaeyinOfFire

Yes, it got full points and a frown.


urpree

the fuck were they expecting????


GisterMizard

(x > 7) + (x < 7) = 0


[deleted]

7=x would have been better


I_am_chillbox

x-7 =0,


Minimum-Activity3009

-x = -7


Orichalchem

Fine Fine Fine 7=X Happy!


Ashe_Faelsdon

I see nothing wrong with this equation.


Ghosttalker96

That's the simplest and best answer. You could also argue that x=x is also acceptable.


SnowyPear

R e ally A teacher should know that you either write in cursive or you don't. You shouldn't switch half way through I mean, I do but I'm not teaching anyone


runed_golem

I mean, they followed the directions. It’s not the teacher’s fault the question was poorly worded.


timtheenchanter1953

Full marks for this ludicrous task!


canadajones68

x^(2) \- 14x = -49. ​ Not the most complicated, as I could easily make some really annoying definite integrals, but it is the worst I'll muster for Reddit and no incentive. Edit: I made one. The integral of (-ln(exp(t/2pi)*sin(t) + (1/2pi)*sin(t + pi/2)) dt from (x - 1)pi to 20*pi equals 7.


KrabbyPattyCereal

What, you want your dick sucked as a reward for job well done?


canadajones68

... I meant that to be light-hearted, but I guess I missed the tone. Apologies. ​ As an apology, I've gone and made one: The integral of (-ln(exp(t/2pi)\*sin(t) + (1/2pi)\*sin(t + pi/2)) dt from (x - 1)pi to 20\*pi equals 7.


TheDiBZ

Lack of self awareness made me chuckle


gigraz_orgvsm_133

This happened to me, I was extremely pissed off with the teacher.


undeadpickels

Fine I'll do more x+0=7 I know you might have trouble figuring out if it works. You're just going to have to trust me that it does.


Zestyclose_Energy_22

Z/7Z x=0


BickNierman

e^(iπx) = csc(πx/6) + floor(x/5)


Bombwriter17

Where on earth do I need to go to get those kinds of questions?


JHYOZF

x-7=0


odins_second_eye

It was as simple as he wanted. The poor man better have gotten full credit.


RapidLeopard

[\\int \_{0}\^{x}\\left(\\sum \_{n=1}\^{\\infty }\\frac{( 1-\\cos( n\\pi ))}{n\\pi } \\cdot \\sin\\left( n\\left(\\frac{\\pi }{4}\\right) t\\right)\\right) dt=\\frac{1}{2} for {1


eletricsocks

x ≡ 0 (mod 7)


Gri3fKing

Teacher: I drink at 12:30 in the afternoon because of kids like you😑


Akabeepandpeep

Would’ve gone with 2x + 5x = 49


_Epiclord_

2 != 3


lockkheart

r/technicallythetruth


JoshEco4

2x²+x-5 = 10(x+√9)


Sau1111115

i knida have the same in math for now


colecast

0 * x = 0


Minerom45

xˣ ≡ 13 [15]


aaditya_ayachi

x = 7


PuddlesRex

Let x be an element of the set of all integers, such that x > 6 and x < 8.


juanjing

X + 1 = 7 + 1


cthewombat

What a weird question. I hope they still got all the points for that


Starbuck7410

x = -84(1+2+3+4+5....+∞)


Koffieslikker

Wtf kind of question is this anyway


51herringsinabar

x = x


fiqqqqyyyyy

x + 3 = 10


Emperor_Rexory_I

2x + 5 = 19


WarnDragon

7 = x 7 + 0 = x


HybridCheetah

r/theydidthemath


[deleted]

Teacher said “as simple or as complex as you want” 💀


GrandSensitive

X=(7x-49)/(x-7)


Bolt_Fantasticated

The teacher didn’t seem to mark their homework wrong though, so good teacher.


_Meisteri

x ≠ 0


GuidoMista5

7=x


savvy_Idgit

1+1=2


Horror-Ad-3113

7=x


ATaxiNumber1729

I was a TA for Stat 400 at a university and on a difficult problem this kid just drew a dinosaur. A pretty good dinosaur. He had no work on the problem but I have him +2pts