program p1;
uses crt;
var
a,h,sum:real;
n:integer;
function F(x:real):real;
begin
F := (sqr(x)+1)/x;
end;
function Summa(a,h:real;n:integer):real;
var i:integer;
s:real;
begin
s:=0.0;
for i:=0 to n do
begin
s := s + F(a+i*h);
end;
Summa := s;
end;
var
begin
clrscr;
writeln('Vvedite dannie');
write('a=');readln(a);
write('h=');readln(h);
write('n=');readln(n);
sum := Summa(a,h,n);
writeln('Summa S =',sum:8:2);
readln;
end.