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Hi there ! I dont know if I need to write in englis or in french but anyway. I m not good at math but trying to improve so my question might be stupid but here s the point : i d like to enter on the "calculatrice" this formula : 100a/1-(1+a)-n . My problem is this "-n" It goes on the top right corner on the last parenthese and i dont know how to find this " -n " on my "calculatrice" and ideally, instead of n would be a 7 lol
Thanks for your answers
 4 août 2013
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 5 août 2013

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