Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#1 Re: Help Me ! » Prime numbers importance » 2017-11-24 06:58:43

But a question. How do thay encrypt something with public key?

#3 Help Me ! » Prime numbers importance » 2017-11-22 06:33:04

Replies: 3

Can somebody tell me that why there's so much fuss about prime numbers?

#5 Help Me ! » AH^2=CH*BH in right angle triangle » 2017-11-21 05:35:10

Replies: 2

Assume you have right angle triangle called ABC that A=90.draw a perpendicular line to BC from A angle and label the point it met , H . Then we have AH^2=BH*CH. I will prove by pythagorean theorem BUT I don't know where is the mistake!

#7 Re: Help Me ! » Represent sqrt{2}+sqrt{3} on a number line » 2017-11-01 01:22:30

Thank you for answering. I'm saying that the second start point((suppose you've drawn sqrt{2} and this point is the second start point)) would not be exact. then, as you know we can't use pythagorean theorem because we can't say that we draw a line with size of A from a certain origin and then we can't have a triangle with a horizontal line in length of something wanted and therefore there would not be a hypotenuse in length of like sqrt{3} or something else.

#8 Help Me ! » Represent sqrt{2}+sqrt{3} on a number line » 2017-10-31 02:53:04

Replies: 4

I searched a lot about it but I haven't found a thing! I were assuming that you guys can help me. The question is just what I wrote in title ((Represent sqrt{2}+sqrt{3} on a number line)).what that make this diffrent is that it's not like adding an rational to irrational because there you had a certain start point and you draw a triangle and it would be done but in the problem that I mentioned when you draw first triangle you will have a point that doesn't exist((it's value is not accurate))! And therefore it's stupidness to draw another triangle from that point.Then, what to do?

#9 Re: Help Me ! » Probabilty of a family's children » 2017-10-13 06:14:37

THANK YOU SO MUCH!! I were struggling to understand this (binomial page really worked)

#10 Help Me ! » Probabilty of a family's children » 2017-10-12 05:25:09

Replies: 2

You have 3 children in a family . What is the probability of having 2 girls ?
I've confuesd . I've tryed this method but I don't know why it is not working!
First for n(s) we can say 2*2*2 (every child have two possibility)so it equals 8 then for n(a) we can say because we want 2 girls so 2 children would have just one possibility namely , 1*1*2 then it would equal to 2. But if you write down every possibilty it would be 3! My approach is the same thing for calculating sub sets of some (X) set that is n(s), and for n(A) as I've mentioned . So if ANYONE knows what's wrong or know a better way than write down all possibilties you can make me delighted by leaving it in the comment! THANK YOU;-)

#11 Help Me ! » adding vectors to each other » 2017-09-15 18:19:29

Replies: 1

I red somewhere about adding vectors would result in zero or nothing if they have these rules applied on them :
if there's a collection of vectors that all of them have the same length and any vector have equivalent degree between it-self and its adjacent one and sum of all degrees are 360 degrees then resultant vector would zero .
how's that possible ? please if anyone knows a proof write it below. thank you

#13 Re: Help Me ! » Polynomial » 2017-08-02 16:49:33

So ,,, we don't include negative exponents or a variable in denominator a part of polynomial just because we do not want to make polynomials hard to understand or a difficult thing . Is it just right for square root of a variable?

#14 Help Me ! » Polynomial » 2017-07-31 18:45:56

Replies: 6

Why something with negative exponent or a variable at denominator is not allowed to be called polynomial?(I know the rules of polynomial but I don't know why )

#15 Re: Help Me ! » Algorithms » 2017-03-20 23:24:34

Thanks for your answering.

#16 Re: Help Me ! » Algorithms » 2017-03-20 08:47:26

just I confused a bit. Is this algorithm just a name that people put on things that are match with algorithm defenition or it got some formulas like another stuff in maths?

#17 Re: Help Me ! » Algorithms » 2017-03-20 00:28:33


Without question marks

#19 Help Me ! » Algorithms » 2017-03-19 01:17:57

Replies: 10

Hi guys,I'm abbas from iran 14years and I was just searching for maths sites and suddenlly discoverd this amazing site.I had a question. What is algorithm and its usement and the field we can use it in maths? THANK YOU ALL

Board footer

Powered by FluxBB