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  Program Pr115_3; var k, n : integer; suma : real; begin readln(n); suma := 0; for k := 1 to n do suma := suma + 1 / sqr(2*k+1); writeln(suma); readln; end.

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  Original authors: Talmon Marco, Igor Magazinnik Programming languages: Java, C, Python, C , Qt, Objective-C

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