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## #1 2013-03-11 20:09:01

debjit625
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### Want to be sure...

Find the sum of the following geometric series

But the book gives an answer of

I think its a mistake ,it should be

Or am I wrong

Just want to be sure...

Thanks

Last edited by debjit625 (2013-03-11 20:26:58)

Debjit Roy
___________________________________________________
The essence of mathematics lies in its freedom - Georg Cantor

## #2 2013-03-11 20:18:15

bobbym

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### Re: Want to be sure...

Hi;

What happened to the n?

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #3 2013-03-11 20:19:10

debjit625
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### Re: Want to be sure...

Ok I just got it

Solved the problem

Debjit Roy
___________________________________________________
The essence of mathematics lies in its freedom - Georg Cantor

## #4 2013-03-11 20:20:48

debjit625
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### Re: Want to be sure...

Sorry I was in hurry its will be -n .I edited it on the first post too...

The problem was it just got out of my mind about multiplicative inverse i.e..

Thanks

Last edited by debjit625 (2013-03-11 20:27:53)

Debjit Roy
___________________________________________________
The essence of mathematics lies in its freedom - Georg Cantor

## #5 2013-03-11 20:21:22

bobbym

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### Re: Want to be sure...

That is okay. Glad you figured it out.

That is the answer mathematica gets too.

Last edited by bobbym (2013-03-11 20:32:44)

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.