- #1

- 148

- 0

[tex]\sum_{n=2}^{\infty} \begin{pmatrix}

{n}\\

{2}

\end{pmatrix} z^{n}[/tex]

{n}\\

{2}

\end{pmatrix} z^{n}[/tex]

- Thread starter geft
- Start date

- #1

- 148

- 0

[tex]\sum_{n=2}^{\infty} \begin{pmatrix}

{n}\\

{2}

\end{pmatrix} z^{n}[/tex]

{n}\\

{2}

\end{pmatrix} z^{n}[/tex]

- #2

Office_Shredder

Staff Emeritus

Science Advisor

Gold Member

- 3,914

- 184

Which part is confusing you?

- #3

- 148

- 0

It's supposed to be a power series, but I don't understand how to decipher the brackets.

- #4

- 22,089

- 3,286

[tex]\binom{n}{k}=\frac{n!}{k!(n-k)!}[/tex]

See http://en.wikipedia.org/wiki/Binomial_coefficient

- #5

- 148

- 0

Many thanks!

- Last Post

- Replies
- 4

- Views
- 2K

- Last Post

- Replies
- 4

- Views
- 1K

- Last Post

- Replies
- 3

- Views
- 4K

- Last Post

- Replies
- 3

- Views
- 1K

- Last Post

- Replies
- 9

- Views
- 947

- Last Post

- Replies
- 3

- Views
- 2K

- Last Post

- Replies
- 3

- Views
- 590

- Replies
- 2

- Views
- 912

- Replies
- 2

- Views
- 3K

- Last Post

- Replies
- 2

- Views
- 1K