Why Does dV/V Equal ln(Vd/Va) in Physics Homework?

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Donna14
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Homework Statement



See attachment

In the first place I don't understand why you can just say: dV/V = ln(Vd/Va) ( was given in lecture slides)

And I am not sure if my attempt to the solutions is any good...
Hope Someren can help me a bit with b and c


Homework Equations





The Attempt at a Solution



See second attachment
 

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I think you have forgotten to attach the files.
 
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BOAS said:
I think you have forgotten to attach the files.

Can you help me now the attachment is there? Thanks!
 

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