- #1
dirk_mec1
- 761
- 13
Homework Statement
http://img705.imageshack.us/img705/20/33060912.png
Homework Equations
http://img706.imageshack.us/img706/7514/67377660.png
The Attempt at a Solution
I don't understand how they find equation number (5). Can somebody help me with this?
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