Bài 1:
uses crt, math;
var n, i , S: integer;
begin
clrscr;
write('Nhap n = ');readln(n);
S := 0;
for i := 0 to n do
begin
S := S + i;
end;
write(sqrt(S));
readln;
end.
Bài 2:
uses crt, math;
var n, i : integer;
S : float;
begin
clrscr;
write('Nhap n = ');readln(n);
S := 0;
for i := 1 to n do
begin
S := S + power(-1, i - 1) * i;
end;
write(S:4:3);
readln;
end.
Bài 3;
uses crt, math;
var n, i : integer;
S : float;
begin
clrscr;
write('Nhap n = ');readln(n);
S := 0;
for i := 1 to n do
begin
S := S + float(i) / i + 1;
end;
write(S:4:3);
readln;
end.
Chúc bạn học tốt!
_thanhtrong_