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demiseee
04/05/2022 13:18:26
Should I use the difference symbol instead? or the "not a subset" one?
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R00tKiT
04/05/2022 13:25:23
It's D⊄H
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R00tKiT
04/05/2022 13:25:52
The subset relation is also referred to as the inclusion relation.
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demiseee
04/05/2022 13:26:38
Oh okayy.. Thank you so much for that. It was very confusing for me
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demiseee
04/05/2022 13:26:43
.close
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Tillolenski
04/05/2022 13:30:14
@Hwai I'm sorry, I'm not sure, if I'm allowed to ping or not, but could you just walk me through your thought process, when it comes to solving those roots
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Hwai
04/05/2022 13:30:25
sup
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Hwai
04/05/2022 13:30:35
so
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Hwai
04/05/2022 13:31:09
(x)^2 +/- 2(x)(y)+(y)^2
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Hwai
04/05/2022 13:31:13
idk what to tell you
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Hwai
04/05/2022 13:31:31
rerepresent the integer with x^2+y^2
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Tillolenski
04/05/2022 13:31:49
I know, but it's really difficult go the other way
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Hwai
04/05/2022 13:32:05
for example in 6-2sqrt5
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Tillolenski
04/05/2022 13:32:05
I thought you had like a little process in your head, but I guess it's just practice
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help-10
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Hwai
04/05/2022 13:32:12
you see that 2sqrt5
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Hwai
04/05/2022 13:32:19
5 is a PRIME
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Tillolenski
04/05/2022 13:32:24
okay
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Hwai
04/05/2022 13:32:26
and 2 cant be used at all
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Hwai
04/05/2022 13:32:45
so you should think that we write it is 2sqrt5 *1
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Hwai
04/05/2022 13:32:53
(sqrt5)^2+1^2=6
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Hwai
04/05/2022 13:32:55
so yay
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Hwai
04/05/2022 13:33:05
i forgor the 2nd example
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Tillolenski
04/05/2022 13:33:23
9+2sqrt14
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Hwai
04/05/2022 13:33:27
here
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Hwai
04/05/2022 13:33:33
you see sqrt14=sqrt2 sqrt7
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Hwai
04/05/2022 13:33:36
well
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Hwai
04/05/2022 13:33:41
isnt it just obvious now
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Hwai
04/05/2022 13:33:44
🤨
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Tillolenski
04/05/2022 13:33:59
yes yes, I think I get it now
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Tillolenski
04/05/2022 13:34:09
mkay
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Hwai
04/05/2022 13:34:17
oh sometimes you split the 4 btw
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Hwai
04/05/2022 13:34:26
2\*(2x)*y
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Hwai
04/05/2022 13:34:29
👍
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Tillolenski
04/05/2022 13:34:38
okay, yeah I got it right
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Tillolenski
04/05/2022 13:34:48
thank you hwai
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Hwai
04/05/2022 13:34:58
np
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Tillolenski
04/05/2022 13:35:00
I'll need to work on these, but it's a start
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Tillolenski
04/05/2022 13:35:14
.close
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af5ddf88f4c04db19769622f98d3349b
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seΛn
04/05/2022 14:02:17
how can I solve this equation? Using arcsin doesnt work I think because then I'd have arcsin(0,81x)... which doesn't solve the issue 0=0,81x+sin(x)
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help-10
af5ddf88f4c04db19769622f98d3349b
913,846,371,382,091,900
-- 000 ---
04/05/2022 14:02:45
can u give the whole question
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seΛn
04/05/2022 14:04:08
its in german. I have to find the point with the biggest difference between two equations. So I decided to combine the two, then use f'(x) to figure out the highest point.
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help-10
af5ddf88f4c04db19769622f98d3349b
913,846,371,382,091,900
-- 000 ---
04/05/2022 14:05:30
actually arcsin0.81x should work
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help-10
af5ddf88f4c04db19769622f98d3349b
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seΛn
04/05/2022 14:05:42
but how do I solve it when x is involved
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help-10
af5ddf88f4c04db19769622f98d3349b
913,846,371,382,091,900
-- 000 ---
04/05/2022 14:06:05
wait
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af5ddf88f4c04db19769622f98d3349b
193,692,307,453,771,780
Syst3ms
04/05/2022 14:11:51
yeah that's a shit equation, good luck finding an analytical solution
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af5ddf88f4c04db19769622f98d3349b
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Syst3ms
04/05/2022 14:12:08
for the record the solution to cos(x)=x doesn't have a closed form expression
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help-10
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seΛn
04/05/2022 14:12:38
well I would guess that this is just not what they intended me to do
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help-10
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seΛn
04/05/2022 14:13:10
but otherwise I really have no idea how to do this
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R00tKiT
04/05/2022 14:18:22
Your best bet is to apply the newton-raphson method to f(x)=0,81x+sin(x) to find a good approximation of x
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help-10
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R00tKiT
04/05/2022 14:18:43
As it was pointed out it's unlikely that there is a closed form solution
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help-10
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R00tKiT
04/05/2022 14:19:19
the sine function is transcendental
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af5ddf88f4c04db19769622f98d3349b
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seΛn
04/05/2022 14:19:19
hmm sad
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R00tKiT
04/05/2022 14:19:49
Yep weird equation
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seΛn
04/05/2022 14:19:52
its -1.0981 and 1.0981 (got it from geogebra)
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seΛn
04/05/2022 14:20:03
very sad, hoped i couldve solved it somehow
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seΛn
04/05/2022 14:20:12
welp thanks all
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af5ddf88f4c04db19769622f98d3349b
355,414,232,571,052,000
seΛn
04/05/2022 14:20:15
.close
1
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Rezende
04/05/2022 14:27:35
[discrete-math] Finding four piles of rocks on a trail, we decided to rearrange them into five piles. Show that at least two rocks finished in smaller piles.
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Rezende
04/05/2022 14:29:17
I was thinking that this one would be easy. But I'm not finding the way to make the proof. The pigeonhole principle is enough?
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help-10
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Rezende
04/05/2022 14:32:29
Like, the number of rocks dont grow, but the number of piles do. So its obvious that some piles will have less rocks then others
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help-10
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Rezende
04/05/2022 14:33:52
But I dont think that this argument will suffice
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Rezende
04/05/2022 14:44:05
@Helpers
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dk.dkn
04/05/2022 16:54:02
Sorry for the long wait
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dk.dkn
04/05/2022 16:54:10
Idk if you’re still on this problem
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dk.dkn
04/05/2022 16:54:51
But if you are, one way to approach it is to think about labelling the piles, and then you can work with inequalities to establish the result
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help-10
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dk.dkn
04/05/2022 16:55:22
It’s also good to order them
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help-10
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dk.dkn
04/05/2022 16:56:56
If you want a bit more help: ||you could consider summing the largest (some number) piles, up until the sum for the first pile is larger than that of the second one (which must occur at some point)||
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Rezende
04/05/2022 17:17:05
Relax, you're not obliged. You're doing me a favor to come in here and helping and I'm grateful for this
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help-10
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Rezende
04/05/2022 17:23:45
Like, sum the largest piles to the first and second one to find and prove the inequality between them?
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2d372fbdc95b4bb783684a8a3cabc2bb
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Rezende
04/05/2022 17:24:06
assuming that they are the smaller piles
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dk.dkn
04/05/2022 17:39:07
Yeah
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2d372fbdc95b4bb783684a8a3cabc2bb
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dk.dkn
04/05/2022 17:39:42
So if you let the first piles be p_1 up to p_4 and the second q_1 up to q_5
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dk.dkn
04/05/2022 17:40:12
At some point p_1 + … + p_n > q_1 + … + q_n and it’s a useful result
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help-10
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dk.dkn
04/05/2022 17:40:37
It’s quite an intuitive thing, the proof probably less so though
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dk.dkn
04/05/2022 17:40:53
I’d be interested in a proof in plain english or a really elegant one
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dk.dkn
04/05/2022 17:42:02
I should say p_1 > p_2 > … and similarly for q
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help-10
2d372fbdc95b4bb783684a8a3cabc2bb
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Rezende
04/05/2022 17:55:03
Unfortunately I need to write this in portuguese
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2d372fbdc95b4bb783684a8a3cabc2bb
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Rezende
04/05/2022 17:55:04
haha
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help-10
2d372fbdc95b4bb783684a8a3cabc2bb
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Rezende
04/05/2022 17:55:15
But thanks man, helped a lot
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null
1,710
help-10
2d372fbdc95b4bb783684a8a3cabc2bb
309,776,602,282,197,000
Rezende
04/05/2022 17:56:39
.close
1
0
null
null
null
null
null
1,711
help-10
d1a29605f69f4313b17a86e901959dde
321,104,900,584,898,560
clay
04/05/2022 18:57:47
https://cdn.discordapp.c…7394/unknown.png
unknown.png
1
0
null
null
null
null
null
1,711
help-10
d1a29605f69f4313b17a86e901959dde
321,104,900,584,898,560
clay
04/05/2022 18:57:53
hey could someone please walk me through this?
1
0
null
null
null
null
null
1,711
help-10
d1a29605f69f4313b17a86e901959dde
321,104,900,584,898,560
clay
04/05/2022 19:09:46
@Helpers
1
0
null
null
null
null
null
1,711
help-10
d1a29605f69f4313b17a86e901959dde
321,104,900,584,898,560
clay
04/05/2022 19:18:27
.close
1
0
309,776,602,282,197,000
Rezende
6093
Rezende
false
1,713
help-10
27f1375015f945eb8433a554345faae1
553,446,897,348,509,700
Darkness_Itself
11/11/2021 18:37:16
Hey, I'm struggling to understand how this tree diagram works (it's basic probability) but I'm not very good at it! Thanks :)
1
0
null
null
null
null
null
1,713
help-10
27f1375015f945eb8433a554345faae1
553,446,897,348,509,700
Darkness_Itself
11/11/2021 18:39:03
Here's the question
https://cdn.discordapp.c…3406/unknown.png
unknown.png
1
0
null
null
null
null
null
1,713
help-10
27f1375015f945eb8433a554345faae1
553,446,897,348,509,700
Darkness_Itself
11/11/2021 18:41:21
I have the answers but I don't really understand how to get them.
1
0
null
null
null
null
null
1,713
help-10
27f1375015f945eb8433a554345faae1
553,446,897,348,509,700
Darkness_Itself
11/11/2021 18:43:21
I'd like if someone could walk me through the process to finding out what the chances are for each part.
1
0
null
null
null
null
null
1,713
help-10
27f1375015f945eb8433a554345faae1
553,446,897,348,509,700
Darkness_Itself
11/11/2021 18:56:46
@Helpers Sorry for the ping! I have been trying to understand and guess how to go about it but I'm not getting anywhere :(
1
0
884,904,554,037,141,600
dk.dkn
6601
dk.dkn
false
1,713
help-10
27f1375015f945eb8433a554345faae1
456,226,577,798,135,800
Deleted User
11/11/2021 18:57:32
whats the answer for a
0
1
884,904,554,037,141,600
dk.dkn
6601
dk.dkn
false
1,713
help-10
27f1375015f945eb8433a554345faae1
553,446,897,348,509,700
Darkness_Itself
11/11/2021 18:57:49
It is 4/9
1
0
null
null
null
null
null
1,713
help-10
27f1375015f945eb8433a554345faae1
278,476,727,708,155,900
polikuj2
11/11/2021 18:58:03
Start with c and d, it's easier. There is a 1/3 chance in getting every question right, and all questions are independant
0
1
309,776,602,282,197,000
Rezende
6093
Rezende
false
1,713
help-10
27f1375015f945eb8433a554345faae1
553,446,897,348,509,700
Darkness_Itself
11/11/2021 18:58:34
I just don't know at all how to go about solving it :/
1
0
null
null
null
null
null
1,713
help-10
27f1375015f945eb8433a554345faae1
456,226,577,798,135,800
Deleted User
11/11/2021 18:59:08
try a probability tree diagram
0
1
null
null
null
null
null
1,713
help-10
27f1375015f945eb8433a554345faae1
456,226,577,798,135,800
Deleted User
11/11/2021 18:59:18
thats how i would go about solving it
0
1
null
null
null
null
null
1,713
help-10
27f1375015f945eb8433a554345faae1
553,446,897,348,509,700
Darkness_Itself
11/11/2021 19:00:07
give me a few minutes
1
0
null
null
null
null
null
1,713
help-10
27f1375015f945eb8433a554345faae1
456,226,577,798,135,800
Deleted User
11/11/2021 19:00:50
i’m not sure if that’ll work but that’s the first thing that comes to mind for this question
0
1
null
null
null
null
null
1,713
help-10
27f1375015f945eb8433a554345faae1
456,226,577,798,135,800
Deleted User
11/11/2021 19:09:20
this is messy but something like this
https://cdn.discordapp.c…340/IMG_8872.png
IMG_8872.png
0
1
884,904,554,037,141,600
dk.dkn
6601
dk.dkn
false
1,713
help-10
27f1375015f945eb8433a554345faae1
553,446,897,348,509,700
Darkness_Itself
11/11/2021 19:09:55
hmm i think i might understand
1
0
null
null
null
null
null
1,713
help-10
27f1375015f945eb8433a554345faae1
553,446,897,348,509,700
Darkness_Itself
11/11/2021 19:10:10
so this isnt right to begin with?
https://cdn.discordapp.c…2034/unknown.png
unknown.png
1
0
null
null
null
null
null