#help-10
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https://www.wikihow.com/Do-Long-Division
Read part 3
I'm dumb I know
Okkk
Thanka
Thanks!!
Do we do 113 divided by 355?
Would 113 be the dividend?
And 355 the divisor
But then that would be impossible to do long division with because ull be doing fractions
So it should be 355 ÷ 113?
And after that we do the reciprocal of it to find the lower bound
yes
Of 1/pi
no
Hi singh
Or 333/106
I suck
Ohh
You had it correct here. I'm very sorry for you mixing you up
Ohhh yeha I was mad confused thanks!!
I thought you were trying to find pi the whole time, not 1/pi
I'm very sorry. I wasted your time and I feel bad
Beautiful
You're doing great
(Still feel bad I got you turned around but I guess it was good long division practice)
Thank you!
Yeah I did most long division back in highachool
And grade school
Been a while
So which one is upper bound?
The larger decimal?
000.374647
Which is 133/355
And lower bound as 106/333 =000.318318
This tells us for c
The decimal expansion should be between those numbers?
0.318318<1/pi<0.374647
???
Someone check and correct me if possible
Yeah I forgot it all too (as you can see)
It's all good
Can I ask another question?
If possible
Thanks for anyone that helped
Yeah it's 2:49 am here
Hehe
Like I can convert root 2 to a decimal and the fractions to a decimal and see which one is bigger or smaller
But I think the professor would want use to do it a certain way
I assume we have to square the root 2
yeah you're missing a detail here
,rcw
Looks good
Thanks again! Appreciate it!
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Hello, I'm trying to solve x^3-((4+i)x)^2+(5+4*i)x-5*i, but I can't find any solution
I need to factorize it by (z-iα) where α is a real
,w y = x^3-((4+i)x)^2+(5+4* i)x-5 *i
@opaque wren Has your question been resolved?
<@&286206848099549185> do you have an idea?
try comparing coefficients
(x-iα)(ax^2+bx+c) = x^3-((4+i)x)^2+(5+4* i)x-5 *i
find a b c and α
all right, I'm going to develop and find the results
I don't think it's what they want me to do, as the first question is "prove that P admit a solution in C pure imaginary i(alpha) that we'd determine"
then, I have to factorize by (z-i(alpha))
don't you think there is another solution, like an evident root?
this doesnt show a purely imaginary solution tho
perhaps you wrote it incorrectly
(sorry for no crop)
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is -i= -e^(ipi/2)
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Can a biconditional statement(p<->q) be verified by testing if p->q and q->p is True
Yes
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number = a* b* c consider a,b,c are primes . How many build up factors does the number have. (the answer is 3) just wondering if there is a formula or smthing to this without actually picking 3 primes
wdym by
"build up factors"
so like for example 2 * 7 * 3
Do you mean prime factors
u get 42
the other ones
You devidr by the lowest prime number
All possible factors except prime?
Until that's not possible you go to the next
yea
Until you have only primes left
Anyway factors of 42 are 1, 2, 3, 6, 7, 14, 21, 42 so you can see that 14, 21 , 6 are the ones im looking for
or what it does
well
NEONPerseus
But I don't think its needed for this
basic combinatorics concept, ncr basically means the number of ways to choose r objects from a set of n
yea me neither lol
For a number $(x_1)^{n_1}(x_2)^{n_2}(x_3)^{n_3}... (x_r)^{n_r}$ where $x_i$ is a prime number and $n_i$ are whole numbers, the total number of factors is $(n_1 + 1)(n_2 + 1)(n_3 + 1)...(n_r + 1)$
NEONPerseus
leme process this
It works on principles of combinatorics
so how would this be used in 2 * 3 * 7 for example
2^1 * 3^1 * 7^1
number of factors = (1+1)(1+1)(1+1)
= 8
8 factors
leme process
If you want only perfect factors, subtract 2 because this includes 1 and the number itself
why do u use the ^1
because the formula requires the powers of primes
So everytime its ^1
You should explain the idea behind it, not just give them a strange formula which they have never seen
Thanks
Yeah I should
not always
sure
yea
Applying the formula would give us (2 + 1)(1 + 1) = 6 factors
In general, a factor of a number is always composed using its prime factors
The idea behind adding one to each power is the number of ways you can select each power to appear in a number
wait so u have to make a number into a number with a power ?
yes, write it as the product of the powers of its primes
Oh wait thats why its 42 = 3^1 * 2^1 * 7^1
yep
If you think of these factors as items in a box
Ohhhhhh thanks
And in how many ways you can pick various amounts of these items
For example in 5^2:
You can pick 0 5s out in 1 way
You can pick 1 5 out in 1 way
You can pick 2 5s out in 1 way
So the total number of ways of picking out a 5 is 3
yeye
which is just 5's exponent plus 1
Similarly for all prime factors
Then you multiply to get all possible cases
The intuition behind the +1 is because you can also choose to not pick a 5 at all
i.e. 5^0
🤝 group mafs
wish u a good one
have a good one yourself
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are you familiar with the inscribed angle theorem?
nope
(assuming O is the center of the circle)
how can i solve it
in a diagram like this, do you know the relationship between the two angles?
consider looking up the inscribed angle theorems if you don't know then already
majority of circle geometry questions will involve that
and point to specific parts you don't understand even after reading
an angle θ inscribed in a circle is half of the central angle 2θ that subtends the same arc on the circle
what does this mean
there should've been a nice diagram that goes with that
the angle which touches the circumference is half the central angle
this is known as the central angle theorem @spiral ferry
ye it was pretty easy to explain @high lily
inshallah
can you solve this now?
would we just divide by 2
yeh
yes
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we are saying this is fault because lnx / lnc != ln(x/c) or something else?
Yes
lnx/lnc = log(c, x)
But ln(x/c) is lnx - lnc
Just for reference:
log2 = log(10, 2)
ln2 = log(e, 2)
In case you didn't know what log(c, x) means
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lmoa ded
because side and angle is there so cosine rule will be good enough to find to answer this question
tho area is provided so i doubt my approach
i am gonna try with cosine rule hope i get the answer lmao
Shockshwat
by this u can find the 3rd side and then you could use herons formula to find the value of x then use values of sin and cos to get the value of angles
sine rule is better to use in this condition tho
but when i plug in 3x and x+5 as a and b, the solution gets very big
abbey bevkoof yeh nahi
is there not an elegant way to solve this?
sine rule
cosine law cosA = (b^2+c^2-a^2)/2bc
this is cosine law
not what u r telling
u r telling law of addition of vectors formula
@mellow glacier
hey @ancient jacinth
yes
u r mistaken
no
the one formula u r telling is of physics to find sum of vectors as far as i remember
Bhai maine literally dono side ko root kar diya
💀
vector addition got its derivation from cosine rule
soka
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i still dont get it
bruh
1/2*sina into bc
like use something like this
ok
$\frac{sinA}{a} = \frac{sinB}{b}$ ig
Shockshwat
2 sides and 1 angle is given
but the 1 angle's side is not given
nah nevermind its in terms of x
could you do it step by step
sorry i m busy
ok i will try to work this out
bro it is literally
Tex me likh
what
$like this$
Shockshwat
$((sin150)(3x)(x+5))/2 = 7.25$
cauchyschwarzsded
i did
for triangle
$\frac{((sin150)(3x)(x+5))}{2} = 7.25$
i did solve for x
Shockshwat
but the thing is, how do i use that huge radical in the equations to solve for that small angle
by this equation you can get x
then put the value of x here
wait what
ya
,w ((sin150)(3x)(x+5))/2 = 7.25
its coming 1.4
oh wait i can just approximate right

lmaoooooooooooooooooooooooooooooooo
yeaaaa
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,rotate
how can I get rid of the integral
Context : I need to find probability density of (X,Y)
show original problem statement?
you can probably sidestep this grueling integral bashing
Ok give me one sec
You understand french right ?
X est une variable aléatoire qui suit une loi normale centrée réduite et Y une loi de Khi-deux.
alors X ~ N(0,1) et Y ~ χ^2(k)...?
Yep
sont-elles indépendantes ?
Oui oui
Je l'ai fait et je suis arrivé à ça
Yep
ça veut dire CDF en rostbif ?
Huh ?
en anglais
J'en sais rien mdr
Ann
celle-ci
c'est qd mm le produit des lois individuelles non ?
directement de la définition des variables indp
J'ai utilisé une définition du cours qui dit que ça revient à determiner la fonction de repartition de (X,Y)
y a pas de bonne forme non intégrale pour la loi de X sans utiliser la fonction erreur ou comment ça s'appelle
exp(-x^2) n'est pas intégrable en fonctions élémentaires
Oui j'ai pensé à la fonction erreur mais je sais pas si c'est possible de le faire sans fonction spéciale
Yep
je n'en pense pas
J'ai oublié de dire, ce que j'ai trouvé là c'est la fonction de repartition
<@&286206848099549185>

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How would I proceed after this?
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My girlfriend got gifted this boomer-humor calendar, and today there is a math one, however, neither of us understand what the humor is intended to be. Any ideas?
too grainy photo
The guy is working on a solution on the whiteboard and his fellows have found the solution and have pinned the tail on the donkey
i don't think you;re supposed to read it lol
the joke is that they put a sticker but it's in math
it's mathy-looking gibberish
It does look like mathy-looking gibberish
there's no reason to even think it's the solution
it's anything, but it's in math
a 'kick me' joke that makes no sense
funny haha math people put math sticker on math man's back
yes that's it
💀
.close if you're done
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Hi
Anyone able to help
depends on the question

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This is my first time doing a proof. Can anyone check this and give me pointers
z is a set of all positive and negative integers
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@spark sail Has your question been resolved?
fine ig
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Discriminant
this is the value I got for the discriminant: k^2 + 2k -143
Do you understand the significance of the discriminant
,w expand (k+1)^2 - 4(9)(4)
don't I have to factorise the discriminant?
u can factor that
how?
so I have to find two numbers that add to 2 and multiply to -143
split the 2k into a sum of k's that when the coefficents multiply give 143
ok so first I start with (k ) (k )
do you know your 10 through 15 or even 20 times tables ?
13 * 10 = 130
if that helps
I mean just move than up to 10 is useful for saving time and avoiding having to use tricks
,w factors of 143
Wolfram Alpha doesn't understand your query!
Perhaps try rephrasing your question?
Click here to refine your query online
:((((
,calc 143 / 13
Result:
11
Gamer
took 2 seconds to spot 13-11 = 2 and 13 * 10 = 130 , so 13 * 11 = 143
Can u come to my channel i need help
clarkie's memorized the multiplication table 1-100
the 1 by 100 multiplication table
okay so I got (k-11)(k+13)
yes
No
k
Just a quick question off topic: which concepts are the most important to cover and master before starting calculus - differentiation and integration?
I am trying to prep for calculus this year, but I missed most of the stuff from previous years, so I'm trying to catch up. It would be great if anyone could help me with which stuff to complete before moving on to calculus.
all things functions and trig? linear algebra, idk
so much
trig identities are painful
so out of these which are the most important to cover?
I can open each individual section if you need specifics, but this would really help me out if I could get your opinion.
I've also completed a decent amount from the various sections
in terms of 'most important' in my experience having knowledge of the general behaviour of functions has proven useful, same can be said for trig identities, hyperbolic functions, all that stuff. but most of my calc 2 , 3 stuff is self taught as we haven't gone over it in the curriculum yet, so I dont know if i'm learning it 'properly' and can't speak for it.
@timber fox what's 1 * 69
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is my first step to find the discriminant?
yup
I don't understand
it is the discriminant
if your discrim is less than 0
it means there are no solutions
Oh that's a nice approach
no real roots
so its gonna be above the x axis..
which is
all
positive
if it touched the x axis or dropped below we would have =0 , >0
Find the vertex and discriminant
And boom
Or
Actually just find the vertex
you dont even need to
try completing the square as well, its a fun alternative to finding discrim
,w 3(-1/6)^2 + (-1/6) + 4
Since the vertex's y value is > 0 and the leading coeffient is > 0 boom
oh true that is also quick
Funny
damn
yes
thats 3 ways to solve it in 2 minutes
-b/2a
poggers
so then how would I answer the question
do I just write a sentence that since the discriminant is negative that must mean there are no real roots
hence it must be above the x-axis
either with what umbral said with his reasoning, what heavy said with his reasoning, or my proof
yes this is completely fine
This is pretty quick though
so is finding the vertex for y>0 for positive x^2
so you would have
damn that looks complex
Let $f(x) = 3x^2 + x + 4$
$$3 > 0$$
$$\min_{x\in R}f(x) = \frac{47}{12}$$
$$\therefore \forall x \in \bR, f(x) > 0$$
$e^{\text{Umbraleviathan}}$
There are complex numbers for roots lol
no I didn't mean that...
Like this
There's a caveat
p < 0
The leading coefficient determines whether the function is concave down or concave up
so no real roots?
Well there cannot be any real roots
But you also need to find what makes the discriminant less than 0
but is this working correct?
Up to you
or could I do this 4-16p^2 = 0
add 16p^2 to both sides
then take the square root?
would that work?
@fierce lagoon
Lex1729
<@&286206848099549185>
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I am going to need help with the math problem
Do you know your quadratic equation?
yes I do know the formula
ok so what do u get after u use it
x =12 +- square(12^2-4(6)(7) over 2a
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Hi I dont really understand what this symbol means
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help
with what
I need help tomorrow I have an exam and I need an answer to this question I am confused. Question: "Arwa has $50 in her bank account and saves $25 per week. Her sister has $15 in her account and saves $55 per week. After how many weeks will they both have the same amount of money in their account? How much money will each have? Write a system of equations and solve using substitution."
with this
please
What have you trid
I already got the equation
Okay what is it
The equations should be (m is money and w is weeks)
m = 50 + 25w
m = 15 + 55w
Those equations differ from what you wrote
I got the weeks
7/6
How did you use that equation to get the weeks?
I basically
50-15
and
55-25
7/6
same as
1.16
or round up
1.2
you wanna see what my teacher got?
uh
as the answer
I know how to get the answer.
ok
So the equation 50x+25y = 15x+55y isn't the right equation
First can you tell me what x represnets
So what did you get for x
1.2
Also there hsoulbe a second eqution
because you can't solve for x and y without a second equaiton
so
Why are we multiplying 50 and x
I mean that x represented 50😭
That is not how you write an equation
I am sorry if that confused u
oh ok
Does that make sense
Just saying "do 50 - 15, and 55 - 25 and then do 35/30" is I would say uncareful logic
Can you explain it in terms of what you do to both sides
It is correct though
I just subract the amounts saved together
and the amount earned per week together
After that I divide if possible
It's like you memorized that if a+bx = c+dx, then x = (a - c)/(d - b)
Do you understand what I mean doing things to both sides
I just want to make sure you understand this for the future
Alright then, we'll continue
So the question is how much moeny they've saved too
Do you know how to calculate that
The money one of them has got is 15 + 55w
we know w = 7/6
so you just substitute it in
15 + 55(7/6)
Does that make sense
When you solve that, if you were to simplify 50 + 25(7/6) you would get the same thing
OH
Wait
my teacher got 80 for the money
Like when they got the same amount
@deft gust
Okay can you show me what your teacher did
Hmmm
wait no that's right
He just posted the answer
that's about 80
Yes, looks like it.
It is 80 because your teache rounded 7/6 to 1.2, and 50 + 25(1.2) = 80
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I am once again requesting help
so this is the problem
I don't know where they got that 9 from plus I don't know how the site got the numbers that are used to factor
This algebra video tutorial focuses on factoring perfect square trinomials. This video provides a formula that will help to do so. It contains plenty of examples and practice problems for you to work on.
My Website: https://www.video-tutor.net
Patreon Donations: https://www.patreon.com/MathScienceTutor
Amazon Store: https://www.amazon.com/...
That might be useful
thank u ama watch it
I know now how to do the problem the only thing is that in my screenshot the first question says find n and the video does not explain how to do that
It was a mix of both videos
alr going
I got it thank you, you know very useful videos
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Anyone know why b and c is wrong?
Looks like you approximated
Unless it tells you to round, you probably should use exact answers
C should be from 35 to 30 no?
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Hi
Is the polynomial $y-x^2$ irreducible over any algebraically closed field?
Eduardo291299
Use abstract algebra channel
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@stone marlin Has your question been resolved?
How?
@stone marlin Has your question been resolved?
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does the fact the one on the right has parenthesis change anything ?
What would it change
I'd guess it's basically just there to frame the problem as "adding a negative"
Which is of course the same as subtracting a positive, but I'd guess they want to get that point across
$$-\frac{8}{25} + \left(-\frac{17}{20}\right) = -\frac{8}{25} -\frac{17}{20}$$
Gamma is an Algebraic Number
ok
can i add 5 to the denominator and numerator on the left to make them equal ?
or add -5
i mean
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2400
@cobalt totem this is once again a plug and chug problem
you know that when we put two letters next to each other in algebra it means multiplication, right?
i see okay
bad notation also you're likely just confusing OP here
ok then let's set that side for a moment
@cobalt totem
you know that when we put two letters next to each other in algebra it means multiplication, right?
right
so then you have your formula
I = P * R * T / 100
can you do part a by plugging in P, R and T with their given values?
5000x12x4 /100


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rude
to find 12% of 5000 we times 5000 by .12
so 5000 * .12 = 600 * 4 = 2400
5000 * .12 = 600
(interest paid for one year)
but 4yrs of interest is paid so
600 * 4
=2400
My brother in christ I gave you the answer before the other person did
.reopen
✅
if y'all wanna keep discussing this
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.
Don't take it personal. Giving the answer doesn't mean they understand it
ann helped me
The way you understand something is not how everyone else learns. Ann helped Angie before so she had experience
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How to find the absolute minimum and absolute maximum values of y=x^3-12x on the interval [0,3]?
I have the answers but Im not sure how to solve it
i know i set it to equal 0 first
and i also know how to find the critical values
which are -2 and 2
nt sure how to solve that in the interval though
i mean the maximum is 0
because from 0 to 3 the equation is always negative or zero
idk if you can use calculus but if you can, then just find the places where the derivative is 0 in the interval
3x^2-12
^ my equation
Sub y'=0 and find value of x
solve for 3x^2-12=0
that's what we're trying to say
solve for when the derivative is equal to 0
^
when you plug in 2 for your original euqation x^3-12x you get -16 lol
maybe be carefull in other exercices that this will give you max and min value. not only min ^^ (just in case)
do you understand why the minimum/maximum has a derivative of 0 btw
But you need reason why you chose x=2 from infinite option between [0, 3]
tbh not rly bc ive been lost in every test 😓
because to get from a low point to the maximum and descend again you need to level out
the top of every hill is flat (excluding jagged edges)
to equal the original number?
ok so we want to solve 3x^2-12=0 to find where the derivative is 0
x=2 in this case, and then you want to plug x=2 into your original function to find the mininmum here
ohhhh
the maximum between [0,3] is just 0 because all other values are negative, so this critical point has to be the minimum (or it could be just a flat part of the graph i suppose but then there'd be another place with derivative 0)
any tips on understanding ap calc ab? i asked my counelor if i could drop out of this class but she said no unless i fail...
send it
finding the mvt of x=1/3x^3-x on the interval [-3,0]
would i find the derivative first
mvt?
so plug in -3 into equation
yeah
then use slope formula between that point and the origin
that's your slope that you wanna find for the MVT
then just take the derivative and then solve for that value
i got 12
can u go step by step pls
what do you understand of the "mvt" first ?
^
ik the formula 😭 and that i hv to dettermine a point in the interval where the slopes and tan lines are equal
i think theres another line its also equal to i dont remember
whell, I think that's pretty much all you need to know
i was absent when my teacher taught it so im a bit confused
do i find derivative then plug in values from derivate 'b' and 'a'
or original
find the slope from (0,0) to (-3,-6), and your goal is to find a tangent line on the graph that also has this slope (aka set the derivative to the slope between 0,0 and -3,-6)
basicly, you look for the slope between a and b (so this is the regular slope equation Dy/Dx ) here (y_2 - y_1) / (x_2 - x_1) with 2 being the b point and 1 the a
and then you look for a point in the function that has the same derivative value ^^
(sorry if I miss spell something, I don't have class in english)
its okay! so kinda like slope formula but you subtract
it is exactly slope formula tho
wait then whats the differnce
wdym? you're trying to find the slope here
oh
so use the slope formula
here to have the slope you do $$\frac{\Delta y}{\Delta x}$$
Tonitch
well in the mvt it's the same
and you will basicly have the slope of the bottom line
oh and in the beginning i plug in the interval values correct?
yes
its okay
i thought you were finding the slope at 0,0 being 0 lol
now that you have the "mean" slope, you have to find a point that have a tan with the same slope
(by definition, the derivative)
=2
d/dx of original equation is = to 0-(-6)/0-(-3)?
so you keep 2 for now, you do the derivative of the function you are looking for and then you look for all the value of that derivative that equals your "mean" value (2)
the mean slope is 2
ho sorry
I didn't check
so now you just have to find $$ \partial f(x) = 2$$ you solve the derivative and you have a simple equation to solve basicly
Tonitch
yep basicly that ^^ sorry
no problem, all good
ohhh






