Harry Surplus
Region: GB
Thursday 30 October 2025 15:39:27 GMT
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faytoury_ :
The domain is determined by the function not the other way around
2025-10-31 01:01:24
709
Phil :
square root of x is definetly a function and the x's domain is [0, infinity) thats a fact. you dont need any more information
2025-10-31 18:42:49
393
thursday girl 😸 :
that person said it’s ‘í’ didnt they at 1:48
2025-10-30 17:17:06
142
hahahahar6757 :
This is wrong a function is just a rule
2025-10-30 19:49:23
91
woutv :
doesnt domain depend on the function? if so its stupid to assume its R, right?
2025-10-30 21:41:08
319
Davi_de :
what? that's so wrong, the domain is x>0, a square root of any negative number is not defined, therefore, the domain is x for every positive real number, and so is the codomain
2025-10-30 20:38:56
34
ltr666_ :
what are you waffling about it is still a function if for all y e R, f(-1) ≠ y, it’s just not surjective
2025-11-01 16:12:54
26
bluesciz :
If you are debating if it is a function maybe define what is a function, then prove that it isn't. And if you use the definition, it most certainly is
2025-10-31 19:06:03
8
Balls :
It’s a function over R^+ but on over R
2025-10-30 23:06:06
11
Shiny :
So just define the domain to be all positive real numbers?
2025-10-30 23:26:34
6
Jasfer V. :
y=sqrt(x) is a function from the get go. There is no need to restrict the domain. The domain is [0,+infinity). That's that.
2025-10-31 08:50:12
39
hadespanda3 :
Just because a function doesn't contain all x values in its domain doesn't make it not a function. The rule for a function is that all x values are mapped to exactly one y value and √x does, in fact, do that
2025-11-02 07:30:22
10
Emmanuel :
what topic is this?
2025-10-30 16:08:57
7
هههههههه :
If you restrict its domain then that makes it a function
2025-10-31 23:48:10
10
Tony :
No one talking about how smooth that curve is
2025-10-31 01:42:24
11
Zahid :
I remember watching these when I was doing my A Levels a couple years back 😂
2025-10-30 17:26:06
8
Reuben628 :
surely by that same logic tan isn't a function because tan90 is undefined, but sin and cos are still functions? doesn't seem right to me
2025-11-06 21:37:52
4
Felix Neumann :
this is wrong as soon as you get to set theory. then the rules get weird, with everything mapping to any one output being very much optional for a function
2025-10-30 22:09:09
5
Fluffy :
domain expansion into the complex plane
2025-12-22 13:49:19
2
𝚜𝚢𝚗𝚌. :
Df: x > 0, all real numbers
2025-10-31 09:01:17
0
Il Ferrarista_2 :
@Il Ferrarista_2:sqrt(x) is indeed a function and its domain is [0,infinity). The only case when the graph is not a function is when there are 2+ outputs for one single input
2025-11-01 10:44:02
3
polymath257 :
A function is a certain type of set of ordered pairs. This is a function. The domain its the set of x values: [0,infty).
2025-11-02 19:44:17
2
Kristian :
Does that mean rational functions aren’t functions du to the gap
2025-10-30 22:07:07
1
Warre :
A gap in a function does not mean it is not a function. How about fx = tan(x)? That's a function too right?
2025-11-18 23:01:02
2
Finlay :
Me watching the entire video as a 3rd year engineering student 😅
2025-10-30 23:20:48
3
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