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531
help-10
939427de5e194032a1875ec105a8f9a7
186,109,587,366,215,680
Omegabet_
02/06/2022 15:48:07
...
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939427de5e194032a1875ec105a8f9a7
396,358,891,237,015,550
Sea Doggo
02/06/2022 15:48:12
😦
1
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help-10
939427de5e194032a1875ec105a8f9a7
186,109,587,366,215,680
Omegabet_
02/06/2022 15:48:22
you didn't know **vertex** form had something to do with the vertex?
0
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help-10
939427de5e194032a1875ec105a8f9a7
396,358,891,237,015,550
Sea Doggo
02/06/2022 15:48:30
yeah cos they didn’t teach it to me that way
1
0
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null
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null
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531
help-10
939427de5e194032a1875ec105a8f9a7
396,358,891,237,015,550
Sea Doggo
02/06/2022 15:48:39
They just told me to use it
1
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531
help-10
939427de5e194032a1875ec105a8f9a7
507,584,570,485,506,050
aspwil
02/06/2022 15:48:40
hay man, maybe he just never made that connection
0
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531
help-10
939427de5e194032a1875ec105a8f9a7
396,358,891,237,015,550
Sea Doggo
02/06/2022 15:48:43
Xd
1
0
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531
help-10
939427de5e194032a1875ec105a8f9a7
507,584,570,485,506,050
aspwil
02/06/2022 15:49:05
i miss the point all the time and then 10 min later im like "OOOHHHHH"
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531
help-10
939427de5e194032a1875ec105a8f9a7
396,358,891,237,015,550
Sea Doggo
02/06/2022 15:49:19
They called it like the square form or something
1
0
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531
help-10
939427de5e194032a1875ec105a8f9a7
507,584,570,485,506,050
aspwil
02/06/2022 15:49:28
lol
0
1
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531
help-10
939427de5e194032a1875ec105a8f9a7
396,358,891,237,015,550
Sea Doggo
02/06/2022 15:49:41
👹 who the hell comes up with this shit
1
0
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531
help-10
939427de5e194032a1875ec105a8f9a7
396,358,891,237,015,550
Sea Doggo
02/06/2022 15:49:52
Anyway thank you guys :>)
1
0
null
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531
help-10
939427de5e194032a1875ec105a8f9a7
507,584,570,485,506,050
aspwil
02/06/2022 15:50:13
no problem, come back (or give me an @) if you get stuck somewhere along the way
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532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 16:22:37
```How many different strings can we get by rearranging the letters of the word MISSISSIPPI in which there are no consecutive symbols S? E.g. SIISIMSIPPS is ok, but MISSISSIPPI, ISIPIMSIPSS are not.``` Is 70 correct answer here? (8 chooses 4) ? ```Suppose we want to make strings containing n distinct symbols (diff...
1
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532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 16:23:26
```Suppose we want to make strings containing n distinct symbols (different from S and each occurring exactly once) and k occurrences of S which are not consecutive, where n ≥ k ≥ 1 (so the length of such strings is n + k). How many such strings can we make? ``` is the correct answer (n+1 chooses k) ?
1
0
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532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 16:39:13
@Mathematics Bot No
1
0
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help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 16:40:04
@Helpers
1
0
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532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 16:47:49
@redeye How about calculating it via
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532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 16:49:09
# words without consequtive s = # words - # word with consequtive s
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1
null
null
null
null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 16:49:33
It's easier to first place the non Ss, then to place the Ss.
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1
null
null
null
null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 16:50:35
Like maybe you'll get xMxIxIxIxIxPxPx when you place the letters other than S in one way.
0
1
null
null
null
null
null
532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 16:50:35
How did you ge those numbers?
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532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 16:50:50
# words should
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532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 16:50:51
okay. #word = 34650
1
0
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 16:50:58
And then you have 8 positions to put 4 Ss.
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805,217,272,087,838,700
Mathematics Bot
0196
Bot
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532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 16:52:53
yeah that's how i got 70.. (8 chooses 4) is that correct then?
1
0
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null
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null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 16:53:02
It's the way to place the Ss.
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896,029,219,413,438,500
redeye
5302
redeye
false
532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 16:53:16
But you need to place the other letters in all the different orderings before the Ss as well.
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 16:53:26
The trick for that is you have 7 other letters.
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1
null
null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 16:53:29
So, 7! on top.
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1
null
null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 16:53:46
Then you have 1 M, 4 Is, 2 Ps, so 7!/(1! 4! 2!).
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 16:53:56
So, altogether 7!/(1! 4! 2!) 8C4.
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help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 16:56:46
7!/(1! 4! 2!) the relation here is multification? 8C4?
1
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 16:57:21
7!/(1! 4! 2!) is the number of ways to rearrange MIIIPPI.
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 16:57:26
You place those first.
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537,482,727,557,955,600
Chai T. Rex
7323
Chai T. Rex
false
532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 16:57:40
,wolf Multinomial[1,4,4,2]
0
1
null
null
null
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null
532
help-10
75b1bffbb1124175815afc02aa6e7131
510,789,298,321,096,700
TeXit
02/06/2022 16:57:42
Results provided by WolframAlpha
0
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 16:58:05
No, the multinomial there won't work, since it doesn't count Ss next to each other.
0
1
null
null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 16:58:12
Or it does count them, rather.
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532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 16:58:19
it's just number of any words
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532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 16:58:26
wanted to verify the number he got above
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532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 16:59:23
as for ss next to each other I think you can just threat "ss" as one symbol
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532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 16:59:38
thus 2 single s to place and one double s
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532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 16:59:58
,wolf Multinomial[1,1,2,4,2]
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null
null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
510,789,298,321,096,700
TeXit
02/06/2022 17:00:00
Results provided by WolframAlpha
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532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 17:00:17
wait no huh
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532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 17:00:22
but there are 4 S's.. if i treat them as one there's still a chance that the other 2 will be consecutive
1
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532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 17:00:52
I think that is fine though, we are just interested in the number of words
0
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532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 17:00:57
with consecutive ss.
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532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 17:01:15
this makes sense to me .. so 34650 - 70 = 34580 is the answer? i get the 70 as @Chai T. Rex suggested
1
0
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null
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null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 17:01:15
this makes sense to me .. so 34650 - 70 = 34580 is the answer? i get the 70 as @Chai T. Rex suggested
1
0
null
null
null
null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 17:01:32
How do you get 70? That seems veeery few.
0
1
null
null
null
null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 17:02:01
let's say you put the ss in the first position, then you have still 9 arbitrary ways to put all the rest
0
1
null
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null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 17:02:12
no way that's 70
0
1
null
null
null
null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 17:02:13
it does. but i got it this way - @Chai T. Rex : "Like maybe you'll get xMxIxIxIxIxPxPx when you place the letters other than S in one way."
1
0
null
null
null
null
null
532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 17:02:13
it does. but i got it this way - @Chai T. Rex : "Like maybe you'll get xMxIxIxIxIxPxPx when you place the letters other than S in one way."
1
0
null
null
null
null
null
532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 17:02:33
See how I arranged the non S letters there?
0
1
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 17:02:45
See how there are 8 xs in which to place Ss?
0
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295,654,938,741,309,440
M8732
6402
M8732
false
532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 17:02:49
And you have 4 Ss.
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1
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532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 17:02:57
exactly
1
0
null
null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 17:02:59
So, 8C4 is the ways to arrange the Ss after the rest.
0
1
295,654,938,741,309,440
M8732
6402
M8732
false
532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 17:03:02
8 postion to put 4 S's
1
0
537,482,727,557,955,600
Chai T. Rex
7323
Chai T. Rex
false
532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 17:03:10
Subtracting that doesn't make sense.
0
1
null
null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 17:03:30
You multiply it with the number of ways to arrange the non S letters since they're happening simultaneously.
0
1
null
null
null
null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 17:04:36
oh yeah true. we need to find the arrangement that doesn't have consecutive S's.. so why subtracting !!
1
0
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532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 17:12:52
Oky I see why my second query yields something to large
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295,654,938,741,309,440
M8732
6402
M8732
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532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 17:13:47
it's because it counts positions doubly since you can place either double ss or 2 single s.
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537,482,727,557,955,600
Chai T. Rex
7323
Chai T. Rex
false
532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 17:14:02
Verified it with computer.
0
1
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null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 17:14:35
verify what
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1
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 17:15:00
The answer.
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null
null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 17:15:36
It's 7!/(1! 4! 2!) 8C4
0
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 17:15:48
```haskell import Data.List (isInfixOf, nub, permutations, tails) import qualified Data.Set as Set (filter, fromList, size) main :: IO () main = print . Set.size . Set.filter (not . isInfixOf "SS") . Set.fromList . permutations $ "MISSISSIPPI" ```
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null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 17:16:23
Take the permutations of MISSISSIPPI, put them all in a set, keep only the ones with no neighboring Ss, count how many elements are in the set.
0
1
null
null
null
null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 17:16:45
Gives 7350 after checking everything.
0
1
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null
null
null
null
532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 17:20:03
I was gonna calculate it a different way without the 70.
0
1
null
null
null
null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
295,654,938,741,309,440
M8732
02/06/2022 17:20:34
I thought he meant 70 as a step in my solution strategy.
0
1
null
null
null
null
null
532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 17:23:00
,w 7!/(1! 4! 2!) Binomial[8, 4]
0
1
null
null
null
null
null
532
help-10
75b1bffbb1124175815afc02aa6e7131
510,789,298,321,096,700
TeXit
02/06/2022 17:23:05
Results provided by WolframAlpha
0
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532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 17:29:30
okay. it's starting to make sense.
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0
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532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 17:29:48
how about this question?
1
0
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532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 17:59:11
@Helpers
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help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 18:29:43
@Helpers
1
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 19:09:03
```Suppose we want to make strings containing n distinct symbols (different from S and each occurring exactly once) and k occurrences of S which are not consecutive, where n ≥ k ≥ 1 (so the length of such strings is n + k). How many such strings can we make? ```
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 19:09:32
OK, so place the distinct symbols in a particular order. How many ways are there of doing that?
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 19:09:35
@redeye
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532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 19:11:22
n!
1
0
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 19:11:37
OK, so let's say you have the distinct symbols A, B, C.
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 19:11:47
And one ordering is BAC.
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 19:11:56
Where can you place the Ss?
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1
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532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 19:12:20
in 4 places `xBxAxCx`
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0
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 19:12:32
OK, so how many is that in terms of n?
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1
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532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 19:12:53
n+1
1
0
null
null
null
null
null
532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 19:12:55
And how many of the places are we choosing?
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532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 19:13:07
n+k
1
0
null
null
null
null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 19:13:24
No, for the Ss.
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1
null
null
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 19:13:38
We already placed the distinct letters.
0
1
896,029,219,413,438,500
redeye
5302
redeye
false
532
help-10
75b1bffbb1124175815afc02aa6e7131
896,029,219,413,438,500
redeye
02/06/2022 19:14:27
for S, we're choosing k
1
0
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 19:14:51
OK, so first we do n! arrangements, then we choose (n + 1)Ck.
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1
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 19:15:00
So, n! (n + 1)Ck.
0
1
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532
help-10
75b1bffbb1124175815afc02aa6e7131
537,482,727,557,955,600
Chai T. Rex
02/06/2022 19:15:18
Do you see why that works?
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