siriusmart

joined 1 year ago
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[–] [email protected] 1 points 2 weeks ago

Hint:

spoilerTry out the following tasks before going for the big one

  1. Draw a circle of radius a.
  2. Animate a point on circle a, let that be your rotational speed.
  3. Animate a circle rolling horizontally (along the x axis) at your rotational speed.
  4. Animate a point on that horizontally rolling circle.

You should now have an idea on how to draw a hypocycloid.

 

Draw a hypocycloid using a graphical calculator (such as Desmos or Geogebra).

Your hypocycloid should include

  • Inner circle of radius `a
  • Outer circle of radius `b
  • As time t increases the point on the inner circle should trace out the pattern, you can animate the graph using t.

Below is the link to a Desmos graph:

https://www.desmos.com/calculator/vzgog7xqrz

 
[–] [email protected] 2 points 2 weeks ago* (last edited 2 weeks ago)

Hint

spoilerIf you are studying the algorithm, you are doing it wrong


Solution: https://gmtex.siri.sh/fs/1/School/Extra/Maths/Qotd%20solutions/2024-08-04_extended-euclid.html

spoiler

 
  • Given n and m are coprime, show that there exist integer n' such that nn' mod m=1.
  • The extended Euclid's algorithm is given below without proof, which may be useful in your proof.

(I'm too lazy to type out the algorithm again, so look at the image yourself)

[–] [email protected] 2 points 3 weeks ago* (last edited 3 weeks ago)
12
submitted 3 weeks ago* (last edited 2 weeks ago) by [email protected] to c/[email protected]
 
  • Prove that z(x mod y) = (zx) mod (zy)

Be rigorous

(trust me bro im gonna daily post trust me bro)

EDIT: assume all variables are integers

 
 
 
 
877
real (lemmy.world)
 
[–] [email protected] 3 points 1 month ago* (last edited 3 weeks ago)

Hint:

spoilerThe size of a set is the number of possible values that an element can take.


spoilersolution: https://gmtex.siri.sh/fs/1/School/Extra/Maths/Qotd%20solutions/2024-06-30_sizes-of-real-sets.html

 
 

I recently started reading TAOCP, in other words you can expect daily posts from me again, because I'll just take some of the cooler questions from there and repost them here.

 
[–] [email protected] -1 points 2 months ago

because I have never heard of this argument before, ever. most media's stance on politics is "their party bad our party good", but the "all the parties are pretty hypocritical" argument has never been explored properly, because its depressing and nobody likes it.

[–] [email protected] 3 points 2 months ago

yup thats the intended solution, im not really familiar with taylor series yet, but maybe for a person who knows taylor series would be able to see it right away

[–] [email protected] 4 points 2 months ago* (last edited 2 months ago)

Hint

spoilerThe solution I have in mind is related to the Taylor series


Hint 2

spoilerIt converges to -ln(2), but why


Solution:

spoilerhttps://gmtex.siri.sh/fs/1/School/Extra/Maths/Qotd%20solutions/2024-06-02-alternating_harmonic.html

[–] [email protected] 5 points 2 months ago

i main zathura, but okular is a good one as well

[–] [email protected] 2 points 2 months ago

Here's a rly cool solution from stackexchange, which blows my average geometric solution out of the water

spoiler

[–] [email protected] 4 points 2 months ago* (last edited 2 months ago) (1 children)

I've shown that ln(n/n-1) is always larger than 1/n, so Σln(n/n-1) for all natural number n will be larger than the series 1+1/2+1/3+...

but I don't know how to make sure the sum of all ln(p/p-1) only when p is prime is larger than the provided series

the question is strongly suggesting its divergent, i just dont know how to show it

[–] [email protected] 43 points 3 months ago (9 children)

i pulled the image from a meme channel, so i dont know if its real or not, but at the same time, this below does look like a legit response

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