Math

[Guest]

I'm not sure. I'm currently trying to find other stuff that's cool (for example, 81 squared is 6561; 6-5=1, and add another 6 into the middle) but so far 61 was the only number that happened to have something like that.

22/7 isn't Pi's exact decimal, as it is 3.14285...

Ah! Well please keep us updated as it seems interesting!

 

Woops! Better remove that!

[Person_Random 4,991]

SAT math has made me stupid, entertain me.

[Guest]

SAT math has made me stupid, entertain me.

Don't worry about SAT Math. Quite frankly, it is an insult to Mathematics.

[girl_from_kurdistanX 383]

Okay, I'm not sure if someone has already said something like this, but a few months ago, I just had an impulsive idea to do 61 squared (Yes, I have tons of impulsive ideas that ultimately leads to something cool/weird). And apparently, the answer to that is 3,721. 3*7=21. Cool way to remember it, huh? (Not that anyone will ever encounter that problem but still) (And yes, I have a bad habit of memorizing random math facts, mostly a two-digit number squared)

 

Oh, and while we're on the Pi Day topic, there's a site called http://mypiday.com that shows you where your birthday (or any other date) appears in Pi. It's actually pretty awesome. Mine is in the millionth or something digit of Pi.

 

And also while we're at the Pi subject, how many digits of Pi can you recite? And please be honest, don't just copy and paste it from some site (or paste it from mine). I know 3.1415926535879323846264833, but don't count on it being 100% correct.

its amazing

what a cool website

me--->3.14

[C.O.N.Q.U.E.R.O.R 3,845]

guys wuts one pluz won

[Guest]

guys wuts one pluz won

Not a number; you can't add a number to a verb. Although the proof of 1+1 = 2 (on a seperate note) is quite interesting as seen below:

 

he proof starts from the Peano Postulates, which define the natural

numbers N. N is the smallest set satisfying these postulates:

 

P1. 1 is in N.

P2. If x is in N, then its "successor" x' is in N.

P3. There is no x such that x' = 1.

P4. If x isn't 1, then there is a y in N such that y' = x.

P5. If S is a subset of N, 1 is in S, and the implication

(x in S => x' in S) holds, then S = N.

 

Then you have to define addition recursively:

Def: Let a and b be in N. If b = 1, then define a + b = a'

(using P1 and P2). If b isn't 1, then let c' = b, with c in N

(using P4), and define a + b = (a + c)'.

 

Then you have to define 2:

Def: 2 = 1'

 

2 is in N by P1, P2, and the definition of 2.

 

Theorem: 1 + 1 = 2

 

Proof: Use the first part of the definition of + with a = b = 1.

Then 1 + 1 = 1' = 2 Q.E.D.

 

Note: There is an alternate formulation of the Peano Postulates which

replaces 1 with 0 in P1, P3, P4, and P5. Then you have to change the

definition of addition to this:

Def: Let a and b be in N. If b = 0, then define a + b = a.

If b isn't 0, then let c' = b, with c in N, and define

a + b = (a + c)'.

 

You also have to define 1 = 0', and 2 = 1'. Then the proof of the

Theorem above is a little different:

 

Proof: Use the second part of the definition of + first:

1 + 1 = (1 + 0)'

Now use the first part of the definition of + on the sum in

parentheses: 1 + 1 = (1)' = 1' = 2 Q.E.D.

 

Taken from: http://mathforum.org/library/drmath/view/51551.html

[C.O.N.Q.U.E.R.O.R 3,845]

 

[Person_Random 4,991]

lol, I suck at statistics and i forgot all my calc knowledge sad.

[girl_from_kurdistanX 383]

why 1+1 equals 2

[personia2 125]

Well if you are viewing this thread, then I should hope you would be fine with going through long proofs and explanations for things.

I have no problem with that, but spoilers allow me to scroll through the stuff that I would consider interesting as compared to uninteresting/irrelevant content. It's not so much about the content but about the forum layout/moderation that is the problem here.

[Person_Random 4,991]

I have no problem with that, but spoilers allow me to scroll through the stuff that I would consider interesting as compared to uninteresting/irrelevant content. It's not so much about the content but about the forum layout/moderation that is the problem here.

ples no discrimin against those who haven't discovered spoilers lol

jk

[Person_Random 4,991]

help me teach my friend calc

[Guest]

help me teach my friend calc

Just a suggestion, but consider Khan Academy! I tried it, and it's amazing in the simple, progressive and concise way everything is explained!

[QuicKK 975]

Daym this topic still alive, here I come after a year 

[Guest]

Oh my gosh! This is the single best moment of my life, returning to the Mathematics topic after an year!!!

There!

[Guest]

Does anybody have any suggestions on functions that can restrict decimals? To be specific, I mean for example if I write 50.123, the function turns it into 50.12. I am aware of the greatest integer function, however if I am not mistaken it doesn't do the same thing.

[Guest]

Does anybody have any suggestions on functions that can restrict decimals? To be specific, I mean for example if I write 50.123, the function turns it into 50.12. I am aware of the greatest integer function, however if I am not mistaken it doesn't do the same thing.

I'd imagine that you'd want to multiply your number by 10^x, where x is the decimal place at which you want to truncate the number, use the floor function, then divide again by 10^x. So to restrict 50.123 to two decimal places, you'd multiply it by 10² to get 5012.3, then use the floor function to get 5012, the divide by 10² again to get 50.12.

[Guest]

I'd imagine that you'd want to multiply your number by 10^x, where x is the decimal place at which you want to truncate the number, use the floor function, then divide again by 10^x. So to restrict 50.123 to two decimal places, you'd multiply it by 10² to get 5012.3, then use the floor function to get 5012, the divide by 10² again to get 50.12.

Ah I see. Thank you very, very much for your help! I'll be back if I still need some help. Thanks again!

[Person_Random 4,991]

calc bc starts tomorrow yeet

[Drazox 665]

I need help please

 

Homework Mathematics

 

The clarity and presentation of the writing will be taken into account in the final grade. To return for the

 

Exercise n ° 1:

 

At a party, a television channel broadcast a match. This channel then proposed an analysis program of this game. The following information is available:

-56% of viewers watched the game;

- a quarter of television viewers watching the game also watched the program;

- 16.2% of viewers watched the show. We randomly interview a viewer. We note the events:

- M: << the viewer watched the match >>;

- E: << the viewer watched the show >>.

We note x the probability that a viewer watched the broadcast knowing that he did not watch the game.

 

Questions:

 

1. Build a weighted tree illustrating the situation.

2. Determine the probability of M∩E.

3.a. Check that p(E) = 0.44x + 0.14.

b. Deduce the value of x.

4. The viewer interviewed did not watch the broadcast. What is the probability, rounded to 10-2, that he watched the match?

Edited October 9, 2019 by 78190-facebook78

[Person_Random 4,991]

I need help please

 

Homework Mathematics

 

The clarity and presentation of the writing will be taken into account in the final grade. To return for the

 

Exercise n ° 1:

 

At a party, a television channel broadcast a match. This channel then proposed an analysis program of this game. The following information is available:

-56% of viewers watched the game;

- a quarter of television viewers watching the game also watched the program;

- 16.2% of viewers watched the show. We randomly interview a viewer. We note the events:

- M: << the viewer watched the match >>;

- E: << the viewer watched the show >>.

We note x the probability that a viewer watched the broadcast knowing that he did not watch the game.

 

Questions:

 

1. Build a weighted tree illustrating the situation.

2. Determine the probability of M∩E.

3.a. Check that p(E) = 0.44x + 0.14.

b. Deduce the value of x.

4. The viewer interviewed did not watch the broadcast. What is the probability, rounded to 10-2, that he watched the match?

sorry sir i do not statistics come back next year to find out!

[Drazox 665]

sorry sir i do not statistics come back next year to find out!

Oki

[spiderman1000 737]

distance between proxima centouri and the sun*the diameter of the milky way+the age of the universe-the duration the solar system has existed/the distance between the milky way and the andromeda.

 

answer:

Spoiler

Wrong question. how can you evaluate distance and time with each other. its like 1 table+1 chair. it will ultimately end up like unlike terms in algebra.

 

[LOLKILLERTOTHEDEATH 1,921]

On 4/12/2020 at 11:44 PM, spiderman1000 said:

distance between proxima centouri and the sun*the diameter of the milky way+the age of the universe-the duration the solar system has existed/the distance between the milky way and the andromeda.

 

answer:

  Reveal hidden contents

Wrong question. how can you evaluate distance and time with each other. its like 1 table+1 chair. it will ultimately end up like unlike terms in algebra.

 

Technically you can just do the operations and get a number, although that number would have no meaning assigned to it.

[spiderman1000 737]

On 4/16/2020 at 8:52 PM, LOLKILLERTOTHEDEATH said:

Technically you can just do the operations and get a number, although that number would have no meaning assigned to it.

well yeah i guess but you need an excuse to avoid this question