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uses crt;
var s:real;
i,n:integer;
begin
clrscr;
readln(n);
s:=0;
for i:=1 to n do
s:=s+1/(i*(i+2));
writeln(s:4:2);
readln;
end.
Bài 1:
uses crt;
var i,s:integer;
begin
clrscr;
s:=0;
for i:=10 to 50 do
if i mod 2=0 then s:=s+i;
writeln(s);
readln;
end.
Bài 2:
uses crt;
var a,i,n:integer;
begin
clrscr;
write('Nhap n='); readln(n);
a:=0;
for i:=1 to n do
a:=a+i*(i+2);
writeln(a);
readln;
end.
uses crt;
var i,n,t:integer;
begin
clrscr;
readln(n);
t:=0;
for i:=1 to n do t:=t+i;
writeln(t);
readln;
end.
uses crt;
var n,i,s:integer;
begin
clrscr;
n:=1;
s:=0;
repeat
s:=s+n;
n:=n+1;
until s>1000;
writeln(n);
readln;
end.
Câu 1:
Program HOC24;
var i,n: integer;
t: longint;
write('Nhap N: '); readln(n);
t:=1;
for i:=1 to n do t:=t*i;
write(n,'! = ',t);
readln
end.
program tim_tong_va_tich;
uses crt;
var n,i:integer;
tong,tich:longint;
a:array[1..100]of integer;
begin
write('nhap so n:');readln(n);
i:=1;tich:=1;tong:=0;
while i<=n do
begin
write('nhap phan tu a[',i,']:');readln(a[i]);
tong:=tong+a[i];tich:=tich+a[i];
i:=i+1;
end;
writeln('tong cua cac so tren la:',tong);
writeln('tich cua cac so tren la:',tich);
readln;
end.
Program HOC24;
var i,n: integer;
t: longint;
begin
write('Nhap n '); readln(n);
t:=1;
for i:=1 to n do t:=t*2;
write('2^,n,' = ',t);
readln
end.
program Tinh_2_mu_n;
var
n, i: integer;
ket_qua: longint;
begin
write('Nhap vao so nguyen n: '); readln(n);
ket_qua := 1;
for i := 1 to n do
ket_qua := ket_qua * 2;writeln('2^', n, '=',ket_qua); readin;
end.
Câu 1:
uses crt;
var i,n,t:integer;
begin
clrscr;
readln(n);
t:=0;
for i:=1 to n do
t:=t+i;
writeln(t);
readln;
end.
uses crt;
var i,n:integer;
a:real;
begin
clrscr;
write('Nhap n='); readln(n);
a:=0;
for i:=1 to n do
a:=a+1/sqr(i);
writeln('Ket qua la: ',a:4:2);
readln;
end.