## Search found 56 matches

- Wed Jan 11, 2012 11:49 pm
- Forum: Algebra
- Topic: $Fn>n^2$ sokol n>12 er jonno shotho induction based proof
- Replies:
**0** - Views:
**492**

### $Fn>n^2$ sokol n>12 er jonno shotho induction based proof

*suppose F(n-1)>2n+1 sokol n>12 er jonno shotho mone kori 1st statement ta n er jonno sotho hole (n+1) er jonno sotho. it means, Fn>2(n+1)+1 =>F(n-1)+F(n-2)>(2n+1)+2 =>F(n-2)>2 eta sokol n>12 er jonno sotho tai 1st statement ta n er jonno sotho hole (n+1) er jonno sotho hoy. ekhon n=13,14 er jonno ...

- Tue May 24, 2011 12:25 am
- Forum: Higher Secondary Level
- Topic: finding the equation from graph..
- Replies:
**4** - Views:
**1524**

### Re: finding the equation from graph..

$(y-3)/(x-2)=(y-8)/(x-5)=Slope(constant)$

- Sun May 22, 2011 12:46 am
- Forum: Algebra
- Topic: Smallest Perimeter of Quadrilateral With Equal Area
- Replies:
**10** - Views:
**2667**

### Re: Smallest Perimeter of Quadrilateral With Equal Area

U didn't hurt me i just ask u what u think about my proof, is it right is it good.

Thanks for comment now i am trying ur proof.

Thanks for comment now i am trying ur proof.

- Sat May 21, 2011 12:52 am
- Forum: Algebra
- Topic: Smallest Perimeter of Quadrilateral With Equal Area
- Replies:
**10** - Views:
**2667**

### Re: Smallest Perimeter of Tetrahedren With Equal Area

i mean a geometric figure with four sides by tetrahedren if any error with that please don't think something different. for example triangle is a geometric figure with three sides.

@Tahmid, u can comment about my proof which can inspire me.

@Tahmid, u can comment about my proof which can inspire me.

- Fri May 20, 2011 5:39 pm
- Forum: Algebra
- Topic: Smallest Perimeter of Quadrilateral With Equal Area
- Replies:
**10** - Views:
**2667**

### Re: Smallest Perimeter of Tetrahedren With Equal Area

$ab=c^2$. let $a=c+x, b=c-y$. then $ab=c^2-cy+cx-xy=c^2$ or, $c(x-y)=xy$ or, $(x-y)=xy/c$ it means $(x-y)$ is positive.

Now perimeter of tetrahedren, $2(a+b)=4c+2(x-y)$

since $(x-y)>0$ So $2(a+b)>4c$

Now perimeter of tetrahedren, $2(a+b)=4c+2(x-y)$

since $(x-y)>0$ So $2(a+b)>4c$

**(proved)**- Fri May 20, 2011 12:44 am
- Forum: Physics
- Topic: বোস আইনস্টাইন statistics
- Replies:
**9** - Views:
**1996**

### Re: বোঁস আইনস্টাইন statistics

hi brother, u can read it in Wikipedia in english language here is link,

http://en.wikipedia.org/w/index.php?tit ... 1&redirs=0

http://en.wikipedia.org/w/index.php?tit ... 1&redirs=0

- Fri May 20, 2011 12:29 am
- Forum: Number Theory
- Topic: Math help!!!
- Replies:
**5** - Views:
**1513**

### Re: Math help!!!

i find these three numbers.it's $(41)^2+(43^2)+(45)^2=5555$.

i find it in this method $(2n-1)^2+(2n+1)^2+(2n+3)^2=12(n^2+n+1)-1$. it means the $4$ digit number$+1$ is divisible by $12$ then i try $1112,3334,5556...$ etc.

i find it in this method $(2n-1)^2+(2n+1)^2+(2n+3)^2=12(n^2+n+1)-1$. it means the $4$ digit number$+1$ is divisible by $12$ then i try $1112,3334,5556...$ etc.

- Fri May 20, 2011 12:08 am
- Forum: Number Theory
- Topic: Math help!!!
- Replies:
**5** - Views:
**1513**

### Re: Math help!!!

the possible 4 digits numbers are 1111,3333,5555,7777,9999.(sum of 3 odd squares is an odd number)

- Fri May 20, 2011 12:04 am
- Forum: Algebra
- Topic: Smallest Perimeter of Quadrilateral With Equal Area
- Replies:
**10** - Views:
**2667**

### Re: Smallest Perimeter of Tetrahedren With Equal Area

i have a different and very easy proof, i hope i will post it.

- Fri May 13, 2011 12:53 am
- Forum: Algebra
- Topic: Smallest Perimeter of Quadrilateral With Equal Area
- Replies:
**10** - Views:
**2667**

### Re: Smallest Perimeter of Tetrahedren With Equal Area

Please post ur proof.