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Bài 1:
uses crt;
var n,i:integer;
s:real;
begin
clrscr;
write('Nhap n='); readln(n);
s:=0;
for i:=1 to n do
s:=s+1/(2*i+1);
writeln(s:4:2);
readln;
end.
#include <bits/stdc++.h>
using namespace std;
int n,kt,t;
int main()
{
cin>>n;
int t=0;
for (int i=1; i<=n; i++)
if (i%2==1) cout<<i<<" ";
cout<<endl;
for (int i=2; i<=n; i++)
{
kt=0;
for (int j=2; j*j<=i; j++)
if (i%j==0) kt=1;
if (kt==0) cout<<i<<" ";
}
return 0;
}
program trungbinh;
uses crt;
var n,i: integer;
s:real;
A: array[1..1000] of integer;
begin
clrscr;
write('Nhap do dai day: '); readln(n);
writeln('Nhap gia tri cua day: ');
S:=0;
for i:=1 to n do
begin
write('A[',i,']= ');
readln(A[i]);
S:=S+A[i];
end;
S:=S/n;
write('Trung binh cua cac so cua day do la: ',S);
readln;
end.
Var a:array:[1..1000] of integer;
i,n,max:integer;
Begin
Write('Nhap so luong phan tu n = ');readln(n);
For i:=1 to n do
Begin
Write('Nhap diem thu ',i,' = ');readln(a[i]);
End;
Write('Cac diem vua nhap la: ');
For i:=1 to n do
Write(a[i]:8);
writeln;
max:=a[1];
For i:=2 to n do
if a[i] > max then max:=a[i];
write('So lon nhat la ',max);
Readln
End.
Uses crt;
var i,n,k,u,f,y: longint;
a: array[1..100] of longint;
begin clrscr;
readln(n);
for i:=1 to n do read(a[i]); readln;
writeln(a[i]);
for i:=1 to n do if(a[i]<0) then k:=k+a[i];
for i:=1 to n do if(a[i]>0) then u:=u+a[i];
for i:=1 to n do if(a[i] mod 2<>0) then f:=f+a[i];
for i:=1 to n do if(a[i] mod 2=0) then y:=y+a[i];
writeln('Tong cac so am la: ',k);
writeln('Tong cac so khong am: ',u);
writeln('Tong cac so le la: ',f);
writeln('Tong cac so chan la: ',y);
readln;
end.
#include <iostream>
#include <vector>
int main() {
std::vector<int> sequence = {10, 3, 6, 10, 6, 12, 10, 9, 18, 19, 21, 15, 19, 24, 21, 19, 27, 27, 28, 30};
int N;
std::cout << "Nhap so tu nhien N: ";
std::cin >> N;
int termN = sequence[N - 1];
int sum = 0;
for (int i = 0; i < N; i++) {
sum += sequence[i];
}
std::cout << "So hang thu " << N << " cua day so la: " << termN << std::endl;
std::cout << "Tong cua " << N << " so hang dau tien cua day so la: " << sum << std::endl;
return 0;
}