Banashree Patra
Banashree Patra
Branch Unspecified
08 Jan 2015

sum of two or more nos power of 2.Prove it

Prove that the positive integers that cannot be written as sums of two or more consecutive integers are precisely the powers of 2.
zaveri

zaveri

Branch Unspecified
6 years ago
I think 3 is the only number that can be written as the sum of two consecutive positive integers . that is 1 and 2 .
Prashanth_p@cchi

Prashanth_p@cchi

Branch Unspecified
6 years ago
zaveri
I think 3 is the only number that can be written as the sum of two consecutive positive integers . that is 1 and 2 .

There are many..... In fact all, other than the powers of 2.
Ex:5 can be 2+3, 6 can be 3+2+1.
whereas 4,8,16 cannot be that way.
Prashanth_p@cchi

Prashanth_p@cchi

Branch Unspecified
6 years ago
Banashree Patra
Prove that the positive integers that cannot be written as sums of two or more consecutive integers are precisely the powers of 2.
How do you want this to be proved???? Examples???
Shashank Moghe

Shashank Moghe

Branch Unspecified
4 years ago
Banashree Patra
Prove that the positive integers that cannot be written as sums of two or more consecutive integers are precisely the powers of 2.

I am curious, is this a textbook example? If you observed that yourself, I need an autograph right away.

Secondly, it is a real neat one. I am trying, but I kind of know this one needs more than just my pedestrian math skills.

Thank you for sharing. Do share the source.
Shashank Moghe

Shashank Moghe

Branch Unspecified
4 years ago
I have been seriously amazed by this mathematical statement. Never thought about this. After some procrastination, today I sat down to write a proof. Hopefully, I have done a convincing job. Please feel free to criticize this. Its handwritten, and my handwriting is very poor. Please accommodate that.
Shashank Moghe

Shashank Moghe

Branch Unspecified
4 years ago
Shashank Moghe
I have been seriously amazed by this mathematical statement. Never thought about this. After some procrastination, today I sat down to write a proof. Hopefully, I have done a convincing job. Please feel free to criticize this. Its handwritten, and my handwriting is very poor. Please accommodate that.

Well, after some deliberation, I found out myself that the "proof" is wrong. It might be a good exercise (to those interested) to find the mistake in the "proof".

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