If and are funtions of , does equal ?

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- Feb 3rd 2010, 08:46 AMwglmbDouble differential / differential squared
If and are funtions of , does equal ?

- Feb 3rd 2010, 09:11 AMHallsofIvy
- Feb 3rd 2010, 09:20 AMwglmb
Thanks a lot :)

- Feb 3rd 2010, 04:51 PMJester