Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °
You are not logged in.
#1 2013-03-11 20:09:01
- debjit625
- Full Member
Offline
Want to be sure...
Find the sum of the following geometric series
I got an answer of
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
- Administrator
Offline
Re: Want to be sure...
Hi;
What happened to the n?
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#4 2013-03-11 20:20:48
- debjit625
- Full Member
Offline
Re: Want to be sure...
Sorry I was in hurry its will be -n .I edited it on the first post too...
Here is the answer
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
- Administrator
Offline
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.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.