program Archimed;
var x:integer;
begin
Write('x='); Readln(x);
writeln('Проверить, как выбор пути решения влияет на результат:');
case x of
2: writeln('1/3+1/8+1/15+1/24+...+1/((n+1)^2-1)');
3: writeln('(1+1/3)(1+1/8)(1+1/15)...(1+1/(n(n+2))');
4: writeln('1/3+1/15+1/35+...+1/((2n-1)(2n+1))');
5: writeln('(1-1/4)(1-1/9)(1-1/16)...(1-1/(n^2))');
6: writeln('1-1/3-1/15-1/35-...-1/((2n-1)(2n+1))');
7: writeln('1+2/2+3/4+4/8+5/16+...+n/(2^(n-1))');
8: writeln('1+1/2+1/4+1/8+...+1/(2^n)');
9: writeln('1-1/3+1/9-1/27+...+(-1/3)^n');
10: writeln('1-1/2-1/4-1/8-...-1/(2^n))');
11: writeln('1-1/3-1/8-1/15-...-1/((n+1)^2-1)');
12: writeln('1+1/3+1/9+1/27+...+1/(3^n)');
13: writeln('3/4+5/36+...+(2n+1)/((n(n+1))^2)');
14: writeln('1/15+1/35+...+1/((2n+1)(2n+3))');
15: writeln('1+3/2+7/4+15/8+...+(2^n-1)/2^(n-1)');
else
writeln('Обратитесь к Автору проекта');
end;
end.
