You are Here: Home >< Maths

# Something's wrong I think... Watch

1. We're trying to prove that this function in the upper left is the PMF of some negative binomial distribution, but in the second row weird things happen...

The hazy part in the exponent is n+3.

2. (Original post by ted25)
We're trying to prove that this function in the upper left is the PMF of some negative binomial distribution, but in the second row weird things happen...

The hazy part in the exponent is n+3.

Is this the bit?

which

The "." means multiply

3. (Original post by ghostwalker)
Is this the bit?

which

The "." means multiply

Aha! The exclamation mark of the factorial is missing. I should have thought it by myself. Thank you!

and there is no reason for the lines she drew at the n!. Too messy notes...

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: April 3, 2013
Today on TSR

### Best unis for graduate salaries

Half of the top 10 aren't even RG...

### My alarm went off in an exam!

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE