It is also in mathematical quickies and গনিতের মজা মজার গণিত ।
the solution is like this.
\[a^{2}+b^{2}+c^{2}=ab+bc+ca\]
\[2a^{2}+2b^{2}+2c^{2}=2ab+2bc+2ca\]
\[(a-b)^{2}+(b-c)^{2}+(c-a)^{2}=0\]
\[a=b=c\]
Search found 829 matches
- Sun Jan 27, 2013 1:19 pm
- Forum: Junior Level
- Topic: 2007 National, Junior 11
- Replies: 2
- Views: 10172
- Fri Jan 25, 2013 2:18 pm
- Forum: Secondary Level
- Topic: a problem from the textbook
- Replies: 3
- Views: 3544
Re: a problem from the textbook
for $\ln(x)$, $x$ can not be negative. So, $x>0$ is the domain. for more, see the Graph or visit Wikipedia. And about equation editor, I think something is going wrong. You may bookmark it . Moreover, you could just use two $ around the equation and latex it. It is so easy. equation editor won't hel...
- Fri Jan 25, 2013 1:13 pm
- Forum: Social Lounge
- Topic: Please notice...
- Replies: 1
- Views: 2561
Please notice...
নতুন সদস্যদের একটু দৃষ্টি আকর্ষণ করছি । কোন পোস্ট করার সময় বা কমেন্ট করার সময় লেখার ভাষার দিকটায় একটু নজর দিবেন । লেখাটা যথাসম্ভব বাংলায় বা ইংরেজিতে লিখলে ভাল হয় । এটা ঠিক যে, আমরা অনেক সময়ই ইংরেজিতে অনুবাদ করে লিখতে পারি না বা ভুল হয় । সেক্ষেত্রে শুধু সেসব অংশটুকু ইংরেজি লেখায় বাংলা উচ্চারন...
- Fri Jan 25, 2013 12:56 pm
- Forum: Junior: Solved
- Topic: Dhaka Junior 2011/9
- Replies: 7
- Views: 14105
Re: Dhaka Junior 2011/9
Sorry for being so late.Shafin wrote:Can u draw it on a paper and then upload the image with positions of all e points? I cant understand the position of enafistiham wrote:$BD=2$
$DE=DO+OE=DO+DO=AC=3$
$BE^2=BD^2+DE^2=13$
here is what you wanted.
- Fri Jan 25, 2013 1:40 am
- Forum: Number Theory
- Topic: minimum please!
- Replies: 8
- Views: 5786
Re: minimum please!
I think that is it. And, so, $a=2$Fahim Shahriar wrote:I think you're talking about this sequence
$2,4,8,16.....,2^n$
$2^n$ has $(n+1)$ factors.
- Fri Jan 25, 2013 1:29 am
- Forum: Physics
- Topic: will it come back
- Replies: 9
- Views: 7511
Re: will it come back
suppose i have a ball having the same mass of the earth.i throw it in the sky.will it come back? তোমার প্রশ্ন যদি এ বিষয়ে হয়, যে পৃথিবী বলের দিকে যাবে না, বল পৃথিবীর দিকে আসবে, তাহলে বলব যে, দুটোই একটা আরেকটার দিকে সমবেগে আগাবে । আর বল পৃথিবীর মিলন হওয়ার বিষয়টা হল, মুক্তিবেগ । যদি মুক্তিবেগের ব...
- Fri Jan 25, 2013 1:17 am
- Forum: Social Lounge
- Topic: Help...!!!...
- Replies: 2
- Views: 2789
Re: Help...!!!...
Big brothers,help me.i am a student of class 9.ami mathematics er vokhto and ami gonit olympiad a participate korte chai.but the problem is i dont know how to prepare me for this.ami onek ebooks download korsi,tarik vhai,samin vhai er poramorsho moto try korchi kintu kono kulkinara korte partasi na...
- Wed Jan 23, 2013 2:17 pm
- Forum: Introductions
- Topic: New Member Here
- Replies: 4
- Views: 5459
Re: New Member Here
Welcome zeeshan and MarkHolland to the forum.
- Mon Jan 21, 2013 11:42 pm
- Forum: Physics
- Topic: Round in Shape
- Replies: 1
- Views: 2936
Re: Round in Shape
The short answer is, each and every particle in this universe tries to be potential-less. When you think about things like stars, planets, natural satellites, think about the gravitation force that is working. everything wants to go to the centre, as mush as possible. If they were in cubic shape, th...
- Sun Jan 20, 2013 11:54 pm
- Forum: Combinatorics
- Topic: from 1 to 100
- Replies: 8
- Views: 6827
Re: from 1 to 100
That was easy !!Rafe wrote:We can take $\displaystyle \binom {100}{2}=4950$ pairs. Now the least result is $1+2=3$ and the greatest is $100+99=199$. So only $197$ results are different and $4950-197$ results are same.