- #1

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## Homework Statement

http://gyazo.com/e7dc83f3f93d01391663d02bf92c0b26

## Homework Equations

I am trying to derive equation 6 from 5 using 1, but I haven't got anywhere. This isn't a homework question, just an information sheet. Can someone show me the steps (no jumps please) on obtaining equation 6. After that, for practice I will attempt df/dv

Thanks

:)