Help with a Lagrangian?

Caesar95

New member
Joined
May 5, 2015
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1
Ciao!

I've some problems understanding (A) why and how the power signs changes after eliminating "lambda".

At (B), I need help in working out "I = 4k" when Mm " I ^-1/4 divide by I ^3/4 = I ^ -1/3

Finally at (C), can some kind soul explains to me how did "4K" turns into "2k"?

Your help is much appreciated!

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