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Need help with these qs (sourced from ekman) (1 Viewer)

likeneverbefore

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Hi everyone i was wondering whether you could help me with these questions and provide written worked solutions if possible!!! Theyre too hard ahah THANKS!
 

InteGrand

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Hi integrand thanks for your answer!!! i was just wondering how you would know to start with what S is?
I simply wrote S for the given sum so that we have a variable assigned to it if we need to refer to it (so it's more convenient to have to keep referring to it as "the sum" and so we can write equations involving it etc.).
 

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