Câu 2: 

#include <bits/stdc++.h>

using namespace std;

double p1,p2;

int i,n;

int main()

{

cin>>n;

p1=1;

p2=1;

for (i=1; i<=n; i++)

{

if (i%2==0) p2=p2*(i*1.0);

else p1=p1*(i*1.0);

}

cout<<fixed<<setprecision(2)<<p1<<endl;

cout<<fixed<<setprecision(2)<<p2;

return 0;

}

program TinhTong;

var

     i: Integer;

     s: Real;

begin

     s := 0;

     for i := 1 to 8 do

     begin

          s := s + 1 / i;

     end;

     writeln('Tong la: ', s:0:2);

     readln;

end.

Câu 6:

uses crt;

var n,i:integer;

begin

clrscr;

readln(n);

for i:=1 to n do 

if n mod i=0 then write(i:4);

readln;

end.

5:

uses crt;

var n,i,dem:integer;

begin

clrscr;

readln(n);

dem:=0;

for i:=0 to n do

if i mod 2=1 then 

begin

write(i:4);

dem:=dem+1;

end;

writeln;

writeln(dem);

readln;

end.

1.

Var i ,n : integer;

S , T : real;

Begin

Write ('n:') ;

Read (n) ;

S:= 0;

T:= 1;

For i:= 1 to n do

S:= S + i;

T:= T * i;

Writeln (' Tong cua ' ,n,' , S );

Writeln (' Tich của ' ,n,', T );

Readln;

End.

2.

program SumAndProductOfNumbers;

var
  n, m, i, sum, product: integer;

begin
  writeln('Enter the values of n and m: ');
  readln(n, m);
  
  sum := 0;
  product := 1;
  
  for i := n to m do
  begin
    sum := sum + i;
    product := product * i;
  end;
  
  writeln('The sum of numbers from ', n, ' to ', m, ' is: ', sum);
  writeln('The product of numbers from ', n, ' to ', m, ' is: ', product);
end.

3.

program SumAndProductOfNumbers;

var
  i, sum, product: integer;

begin
  sum := 0;
  product := 1;
  
  for i := 10 to 25 do
  begin
    sum := sum + i;
    product := product * i;
  end;
  
  writeln('The sum of numbers from 10 to 25 is: ', sum);
  writeln('The product of numbers from 10 to 25 is: ', product);
end.

Số hạng cuối cùng của dãy số này là số nào vậy bạn?

int main() 

{

int n;

long s;

s=0;

i=1;

printf("\nSo n la: ");

scanf("%d",&n);

for(int i=1; i<=n; i++)

    {

    s=s+i;

    }

printf("\nTổng %d là %ld: ", n, s);

}