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**BarandaMan****Guest**

I hope this picture is more clear: i49.tinypic.com/r8iic2.jpg

There are 4 parameters. Alpha, Beta, Yamma and the Circle with the line through.

Then a, a*, b, b*, g, g*, r and e.

These are meanings behind the letters, but there are no other links between these variables apart from those in the equations.

The question is:

Derive an equation for 'r' which does NOT contain a*, e, or r. and

Derive an equation for 'e' which does NOT contain a*, e, or r.

This is the whole chapter completed if you guys can help me with this! I have an answer for 'e', which can hopefully be checked against one of your answers but for 'r', I keep going around in circles and getting r=r, 0=0 or some equivalent statement but no expression!

I look forward to hearing your replies, thank you all!

**John E. Franklin****Member**- Registered: 2005-08-29
- Posts: 3,588

For convenience, here is the image.

Click to enlarge.

**igloo** **myrtilles** **fourmis**

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,912

hi

Are those the same as the other day?

Equation 3 alone will give you r most simply. Just move the beta r term to the left and the b to nrhe right. Then divide by beta.

To get e you'll have to use equations 1 and 2.

Substitute the a* from (2) into (1).

Get all the 'e' terms on one side and the others on the other side.

Factorize the 'e' and divide by the bracket to get e on its own.

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

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