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help-10
fc591fcc770d43caa758e65654e2ae3a
757,544,074,201,792,500
kork
11/05/2021 12:11:27
What does it mean to put an interval or a set into a function?
https://cdn.discordapp.c…0822/unknown.png
unknown.png
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help-10
fc591fcc770d43caa758e65654e2ae3a
468,830,761,261,203,460
Ryuzaki
11/05/2021 12:12:06
$f^{-1}(A) = \{ x\in \mbb{R} | f(x) \in A \}$
0
1
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null
358
help-10
fc591fcc770d43caa758e65654e2ae3a
510,789,298,321,096,700
TeXit
11/05/2021 12:12:08
**Ryuzaki**
https://cdn.discordapp.c…761261203476.png
468830761261203476.png
0
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358
help-10
fc591fcc770d43caa758e65654e2ae3a
468,830,761,261,203,460
Ryuzaki
11/05/2021 12:12:23
you can replace R by the domain of the function
0
1
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358
help-10
fc591fcc770d43caa758e65654e2ae3a
757,544,074,201,792,500
kork
11/05/2021 12:13:56
Sorry, what is the domain? I have only had maths in german so I'm not familiar with the international words yet
1
0
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358
help-10
fc591fcc770d43caa758e65654e2ae3a
757,544,074,201,792,500
kork
11/05/2021 12:16:57
@Ryuzaki
1
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null
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358
help-10
fc591fcc770d43caa758e65654e2ae3a
757,544,074,201,792,500
kork
11/05/2021 12:18:17
Ah wait I got it
1
0
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358
help-10
fc591fcc770d43caa758e65654e2ae3a
757,544,074,201,792,500
kork
11/05/2021 12:18:54
what is A?
1
0
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null
null
null
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358
help-10
fc591fcc770d43caa758e65654e2ae3a
468,830,761,261,203,460
Ryuzaki
11/05/2021 12:19:12
$f:\underbrace{D}_{\text{domain}} \to \underbrace{R}_{\text{range}}$
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358
help-10
fc591fcc770d43caa758e65654e2ae3a
510,789,298,321,096,700
TeXit
11/05/2021 12:19:14
**Ryuzaki**
https://cdn.discordapp.c…761261203476.png
468830761261203476.png
0
1
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null
null
null
null
358
help-10
fc591fcc770d43caa758e65654e2ae3a
757,544,074,201,792,500
kork
11/05/2021 12:29:15
How do you solve that then?
1
0
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358
help-10
fc591fcc770d43caa758e65654e2ae3a
468,830,761,261,203,460
Ryuzaki
11/05/2021 12:29:36
what's your f here?
0
1
468,830,761,261,203,460
Ryuzaki
5323
ryu sama
false
358
help-10
fc591fcc770d43caa758e65654e2ae3a
757,544,074,201,792,500
kork
11/05/2021 12:30:52
I will invent something similiar because I don't want to use the one from the assignment: f(x,y) = xy + 3x
1
0
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358
help-10
fc591fcc770d43caa758e65654e2ae3a
468,830,761,261,203,460
Ryuzaki
11/05/2021 12:31:29
so you need the find the points s.t. f(x, y) lie in the interval [0, 1]
0
1
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358
help-10
fc591fcc770d43caa758e65654e2ae3a
468,830,761,261,203,460
Ryuzaki
11/05/2021 12:31:42
that
0
1
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null
358
help-10
fc591fcc770d43caa758e65654e2ae3a
468,830,761,261,203,460
Ryuzaki
11/05/2021 12:32:00
that's what $f^{-1}([0, 1])$ means
0
1
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358
help-10
fc591fcc770d43caa758e65654e2ae3a
510,789,298,321,096,700
TeXit
11/05/2021 12:32:03
**Ryuzaki**
https://cdn.discordapp.c…761261203476.png
468830761261203476.png
0
1
null
null
null
null
null
358
help-10
fc591fcc770d43caa758e65654e2ae3a
757,544,074,201,792,500
kork
11/05/2021 12:32:34
so [0,1] is the domain?
1
0
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358
help-10
fc591fcc770d43caa758e65654e2ae3a
468,830,761,261,203,460
Ryuzaki
11/05/2021 12:33:35
subset of the range,
0
1
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null
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358
help-10
fc591fcc770d43caa758e65654e2ae3a
468,830,761,261,203,460
Ryuzaki
11/05/2021 12:33:44
you are inverting f
0
1
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358
help-10
fc591fcc770d43caa758e65654e2ae3a
468,830,761,261,203,460
Ryuzaki
11/05/2021 12:34:02
I'll give you an example if that helps
0
1
null
null
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null
358
help-10
fc591fcc770d43caa758e65654e2ae3a
757,544,074,201,792,500
kork
11/05/2021 12:34:07
wait how can you invert a function with two unknowns?
1
0
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null
358
help-10
fc591fcc770d43caa758e65654e2ae3a
468,830,761,261,203,460
Ryuzaki
11/05/2021 12:34:29
take f(x) = x^2 then f^{-1} ( [0, 1]) is the set where f(x) lie in 0 to 1
0
1
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358
help-10
fc591fcc770d43caa758e65654e2ae3a
468,830,761,261,203,460
Ryuzaki
11/05/2021 12:35:18
i.e. 0 <= x^2 <=1 gives -1 <= x <= 1
0
1
null
null
null
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358
help-10
fc591fcc770d43caa758e65654e2ae3a
468,830,761,261,203,460
Ryuzaki
11/05/2021 12:35:42
so in this case $f^{-1}([0, 1]) = [-1, 1]$
0
1
null
null
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null
null
358
help-10
fc591fcc770d43caa758e65654e2ae3a
510,789,298,321,096,700
TeXit
11/05/2021 12:35:44
**Ryuzaki**
https://cdn.discordapp.c…761261203476.png
468830761261203476.png
0
1
null
null
null
null
null
358
help-10
fc591fcc770d43caa758e65654e2ae3a
757,544,074,201,792,500
kork
11/05/2021 12:37:02
ah, so you put in 0 and 1 and use equal or greater than?
1
0
null
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null
358
help-10
fc591fcc770d43caa758e65654e2ae3a
468,830,761,261,203,460
Ryuzaki
11/05/2021 12:37:48
that's a specific example but mostly yes
0
1
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null
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null
null
358
help-10
fc591fcc770d43caa758e65654e2ae3a
757,544,074,201,792,500
kork
11/05/2021 12:37:59
okay
1
0
null
null
null
null
null
358
help-10
fc591fcc770d43caa758e65654e2ae3a
757,544,074,201,792,500
kork
11/05/2021 12:38:11
this
1
0
null
null
null
null
null
358
help-10
fc591fcc770d43caa758e65654e2ae3a
468,830,761,261,203,460
Ryuzaki
11/05/2021 12:38:44
find all the points that maps to the interval you are trying to invert
0
1
null
null
null
null
null
358
help-10
fc591fcc770d43caa758e65654e2ae3a
757,544,074,201,792,500
kork
11/05/2021 12:40:25
Imma be real I have no clue
1
0
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359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
350,796,385,525,825,540
ndam500
01/29/2022 17:05:16
https://cdn.discordapp.c…1620/unknown.png
unknown.png
1
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help-10
2cb7074ec78e4f53800c3f4d50536dfc
350,796,385,525,825,540
ndam500
01/29/2022 17:05:29
which values does this series converges to ?
1
0
null
null
null
null
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359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
350,796,385,525,825,540
ndam500
01/29/2022 17:05:32
here is my work
1
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359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
350,796,385,525,825,540
ndam500
01/29/2022 17:05:47
https://cdn.discordapp.c…960CA4A70F4C.jpg
99E9A4DB-4061-440D-A694-960CA4A70F4C.jpg
1
0
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help-10
2cb7074ec78e4f53800c3f4d50536dfc
350,796,385,525,825,540
ndam500
01/29/2022 17:05:51
value should be 1/7
1
0
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359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
484,702,191,156,985,860
themateo713
01/29/2022 17:09:21
you wrote 4^n = 4^(n-1) / 4, but it's *4
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359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
329,749,386,315,956,200
Sneaky
01/29/2022 17:09:22
The first term isn't 4
0
1
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null
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359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
350,796,385,525,825,540
ndam500
01/29/2022 17:09:48
ok
1
0
null
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359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
350,796,385,525,825,540
ndam500
01/29/2022 17:09:50
true
1
0
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null
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359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
350,796,385,525,825,540
ndam500
01/29/2022 17:10:12
but how do i find the value of the sum
1
0
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null
null
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359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
329,749,386,315,956,200
Sneaky
01/29/2022 17:10:59
By correcting the first term and doing what you did again
0
1
null
null
null
null
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359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
484,702,191,156,985,860
themateo713
01/29/2022 17:11:04
you got the formula, just use the right starting value
0
1
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null
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359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
328,662,734,008,746,000
Geopchad
01/29/2022 17:11:08
note that
0
1
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null
null
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359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
328,662,734,008,746,000
Geopchad
01/29/2022 17:11:57
$\frac{(-3)^{n-1}}{4^n} = \frac{1}{-3} \cdot \left(\frac{-3}{4}\right)^n$
0
1
null
null
null
null
null
359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
510,789,298,321,096,700
TeXit
01/29/2022 17:12:09
**M.E.G. Yottachad**
https://cdn.discordapp.c…734008745984.png
328662734008745984.png
0
1
null
null
null
null
null
359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
328,662,734,008,746,000
Geopchad
01/29/2022 17:12:19
right just multiplying top and bottom by -3
0
1
null
null
null
null
null
359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
328,662,734,008,746,000
Geopchad
01/29/2022 17:12:25
so then you can just use the geometric series equation for this one
0
1
null
null
null
null
null
359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
328,662,734,008,746,000
Geopchad
01/29/2022 17:12:31
b/c |-3/4| < 1
0
1
null
null
null
null
null
359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
350,796,385,525,825,540
ndam500
01/29/2022 17:12:48
i need n to become n-1 so i can use my sum formula
1
0
null
null
null
null
null
359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
328,662,734,008,746,000
Geopchad
01/29/2022 17:13:17
oh
0
1
null
null
null
null
null
359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
328,662,734,008,746,000
Geopchad
01/29/2022 17:13:20
then you can say taht
0
1
null
null
null
null
null
359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
350,796,385,525,825,540
ndam500
01/29/2022 17:13:42
https://cdn.discordapp.c…69088/image0.jpg
image0.jpg
1
0
null
null
null
null
null
359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
328,662,734,008,746,000
Geopchad
01/29/2022 17:13:51
$\frac{(-3)^{n-1}}{4^n} = \frac 14 \cdot \left(\frac{-3}{4}\right)^{n-1}$
0
1
null
null
null
null
null
359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
510,789,298,321,096,700
TeXit
01/29/2022 17:13:53
**M.E.G. Yottachad**
https://cdn.discordapp.c…734008745984.png
328662734008745984.png
0
1
null
null
null
null
null
359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
328,662,734,008,746,000
Geopchad
01/29/2022 17:14:03
right i just factored out a 4 from the bottom
0
1
null
null
null
null
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359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
350,796,385,525,825,540
ndam500
01/29/2022 17:16:28
how did you factor 4 out ?
1
0
null
null
null
null
null
359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
350,796,385,525,825,540
ndam500
01/29/2022 17:16:49
oh
1
0
null
null
null
null
null
359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
350,796,385,525,825,540
ndam500
01/29/2022 17:16:50
nvm
1
0
null
null
null
null
null
359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
350,796,385,525,825,540
ndam500
01/29/2022 17:17:18
thats so smart
1
0
null
null
null
null
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359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
350,796,385,525,825,540
ndam500
01/29/2022 17:17:22
thank yo uso much
1
0
null
null
null
null
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359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
350,796,385,525,825,540
ndam500
01/29/2022 17:18:08
@Geopchad
1
0
null
null
null
null
null
359
help-10
2cb7074ec78e4f53800c3f4d50536dfc
350,796,385,525,825,540
ndam500
01/29/2022 17:18:10
.close
1
0
null
null
null
null
null
361
help-10
b4f0b8b2fb754d459ab106d8358928f5
852,592,874,754,932,700
CoffeePls
01/29/2022 17:56:56
https://cdn.discordapp.c…19333/image0.jpg
image0.jpg
1
0
null
null
null
null
null
361
help-10
b4f0b8b2fb754d459ab106d8358928f5
852,592,874,754,932,700
CoffeePls
01/29/2022 17:57:10
where did i screw up?
1
0
null
null
null
null
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361
help-10
b4f0b8b2fb754d459ab106d8358928f5
852,592,874,754,932,700
CoffeePls
01/29/2022 17:57:33
https://cdn.discordapp.c…1680/unknown.png
unknown.png
1
0
null
null
null
null
null
361
help-10
b4f0b8b2fb754d459ab106d8358928f5
935,988,910,025,232,400
Taltost
01/29/2022 18:09:30
redo your cos^2 integral
0
1
null
null
null
null
null
361
help-10
b4f0b8b2fb754d459ab106d8358928f5
852,592,874,754,932,700
CoffeePls
01/29/2022 18:10:29
oh oops, the last term should be zero
1
0
328,662,734,008,746,000
Geopchad
6356
Geopchad
false
361
help-10
b4f0b8b2fb754d459ab106d8358928f5
852,592,874,754,932,700
CoffeePls
01/29/2022 18:15:21
but that doesn't change much, no?
1
0
null
null
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null
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361
help-10
b4f0b8b2fb754d459ab106d8358928f5
935,988,910,025,232,400
Taltost
01/29/2022 18:17:29
are you sure you did the integral correctly?
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1
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361
help-10
b4f0b8b2fb754d459ab106d8358928f5
852,592,874,754,932,700
CoffeePls
01/29/2022 18:17:38
https://cdn.discordapp.c…91026/image0.jpg
image0.jpg
1
0
null
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null
null
361
help-10
b4f0b8b2fb754d459ab106d8358928f5
852,592,874,754,932,700
CoffeePls
01/29/2022 18:17:46
uhh
1
0
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361
help-10
b4f0b8b2fb754d459ab106d8358928f5
852,592,874,754,932,700
CoffeePls
01/29/2022 18:17:47
no
1
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852,592,874,754,932,700
CoffeePls
8979
CoffeePls
false
361
help-10
b4f0b8b2fb754d459ab106d8358928f5
852,592,874,754,932,700
CoffeePls
01/29/2022 18:17:57
the first part should be plus
1
0
null
null
null
null
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361
help-10
b4f0b8b2fb754d459ab106d8358928f5
852,592,874,754,932,700
CoffeePls
01/29/2022 18:18:31
wait
1
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935,988,910,025,232,400
Taltost
8448
Taltost
false
361
help-10
b4f0b8b2fb754d459ab106d8358928f5
852,592,874,754,932,700
CoffeePls
01/29/2022 18:18:32
no
1
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852,592,874,754,932,700
CoffeePls
8979
CoffeePls
false
361
help-10
b4f0b8b2fb754d459ab106d8358928f5
852,592,874,754,932,700
CoffeePls
01/29/2022 18:18:35
oml im so sorry
1
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help-10
b4f0b8b2fb754d459ab106d8358928f5
852,592,874,754,932,700
CoffeePls
01/29/2022 18:18:58
https://cdn.discordapp.c…04564/image0.jpg
image0.jpg
1
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help-10
b4f0b8b2fb754d459ab106d8358928f5
935,988,910,025,232,400
Taltost
01/29/2022 18:19:29
how did you go from line 2 to 3?
0
1
null
null
null
null
null
361
help-10
b4f0b8b2fb754d459ab106d8358928f5
852,592,874,754,932,700
CoffeePls
01/29/2022 18:19:44
yeah so that hsould be 1, not cos theta haha
1
0
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361
help-10
b4f0b8b2fb754d459ab106d8358928f5
852,592,874,754,932,700
CoffeePls
01/29/2022 18:20:09
https://cdn.discordapp.c…01830/image0.jpg
image0.jpg
1
0
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null
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null
null
361
help-10
b4f0b8b2fb754d459ab106d8358928f5
852,592,874,754,932,700
CoffeePls
01/29/2022 18:20:16
got it
1
0
null
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null
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361
help-10
b4f0b8b2fb754d459ab106d8358928f5
852,592,874,754,932,700
CoffeePls
01/29/2022 18:24:01
.close
1
0
null
null
null
null
null
362
help-10
14b40ff5e17748ea9aab0e903774726d
534,773,598,083,219,460
davidbulos
01/29/2022 18:53:47
https://cdn.discordapp.c…E7B60766A950.jpg
A96810BF-B097-447B-A6B4-E7B60766A950.jpg
1
0
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null
362
help-10
14b40ff5e17748ea9aab0e903774726d
534,773,598,083,219,460
davidbulos
01/29/2022 18:54:03
For 5 a how am I supposed to find the phase shift to complete the equation
1
0
null
null
null
null
null
362
help-10
14b40ff5e17748ea9aab0e903774726d
180,305,129,952,509,950
Mohad
01/29/2022 19:02:17
,rotate
0
1
null
null
null
null
null
362
help-10
14b40ff5e17748ea9aab0e903774726d
510,789,298,321,096,700
TeXit
01/29/2022 19:02:19
https://cdn.discordapp.c…129952509953.png
180305129952509953.png
0
1
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help-10
14b40ff5e17748ea9aab0e903774726d
534,773,598,083,219,460
davidbulos
01/29/2022 19:13:23
@Helpers
1
0
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362
help-10
14b40ff5e17748ea9aab0e903774726d
261,933,205,387,477,000
riemann
01/29/2022 19:35:24
The last sentence
0
1
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null
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null
null
362
help-10
14b40ff5e17748ea9aab0e903774726d
534,773,598,083,219,460
davidbulos
01/29/2022 19:46:52
@riemann I’m still confused
1
0
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362
help-10
14b40ff5e17748ea9aab0e903774726d
261,933,205,387,477,000
riemann
01/29/2022 20:57:51
The rung's height is zero when time is zero
0
1
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null
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null
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363
help-10
4a9d1dcb37364d50bc3d3eb3f28cc741
645,687,109,868,585,000
TheCookieMOnster
01/30/2022 00:02:23
Hello
1
0
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null
363
help-10
4a9d1dcb37364d50bc3d3eb3f28cc741
645,687,109,868,585,000
TheCookieMOnster
01/30/2022 00:02:47
https://cdn.discordapp.c…51E9927D5FBE.jpg
FEAEB302-5BBF-47DB-BB62-51E9927D5FBE.jpg
1
0
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null
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363
help-10
4a9d1dcb37364d50bc3d3eb3f28cc741
645,687,109,868,585,000
TheCookieMOnster
01/30/2022 00:03:13
For this problem it says to find the discontinuities
1
0
null
null
null
null
null
363
help-10
4a9d1dcb37364d50bc3d3eb3f28cc741
645,687,109,868,585,000
TheCookieMOnster
01/30/2022 00:04:25
I know that the denominator can’t be zero or negative
1
0
534,773,598,083,219,460
davidbulos
6600
davidbulos
false
363
help-10
4a9d1dcb37364d50bc3d3eb3f28cc741
645,687,109,868,585,000
TheCookieMOnster
01/30/2022 00:04:50
So for the next step can I divide by 2?
1
0
261,933,205,387,477,000
riemann
2529
riemann
false
363
help-10
4a9d1dcb37364d50bc3d3eb3f28cc741
328,662,734,008,746,000
Geopchad
01/30/2022 00:05:09
???
0
1
534,773,598,083,219,460
davidbulos
6600
davidbulos
false
363
help-10
4a9d1dcb37364d50bc3d3eb3f28cc741
739,644,907,677,024,300
n/c
01/30/2022 00:05:24
Imagine f(x) = sin(x)
0
1
null
null
null
null
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363
help-10
4a9d1dcb37364d50bc3d3eb3f28cc741
328,662,734,008,746,000
Geopchad
01/30/2022 00:05:32
First it should be >=
0
1
null
null
null
null
null