1 2
2
3 2 1
) 1 (
2 1
1
n
n
# include <iostream.h>
void main () {
int n,i=1;
float s=0, d=1, m=0;
cout<<"Nhap vao gia tri cua n : ";
cin>>n;
while (i<=n) {
m+=i*i;
s+=d/(m);
i++;
d=-d; } cout<<"Tong S = "<<s;
}
2
S=1-!
) 2 (
! 2
2
! 1
n
N
# include <iostream.h>
void main () {
int n,i;
float s=1,t=1,d=-1,m=1;
cout<<"Nhap vao gia tri cua n : "; cin>>n;
for(i=1;i<=n;i++){
t*=2;
m*=i;
s+=(d*t)/m;
d=-d;
} cout<<"Tong S = "<<s; }
# include <iostream.h>
# include <math.h>
void main () { int n,i;
float x,s=0;
cout<<"Nhap vao gia tri cua n : "; cin>>n;
Trang 2cout<<"Nhap vao gia tri cua X : "; cin>>x; for(i=1;i<=n;i++){
s=sqrt(x+s);
} cout<<"Tong S = "<<s;
}
4 S=
n
n
2
1 ) 1 (
8
1 6
1 4
1 2
# include <iostream.h>
void main () {
int n,i=1;
float s=0,m=1,d=1;
cout<<"Nhap vao gia tri cua n: "; cin>>n;
while (i<=n){
m=2*i;
s+=d/m;
d=-d;
i++;
} cout<<"Tong S="<<s;
}
3 2 1
1
3 2 1
1 2
1
1
n
# include <iostream.h>
void main () { int n,i=1;
float s=0,m=0;
cout<<"Nhap vao gia tri cua n : "; cin >>n;
do {
m+=i*i;
s+=1/m;
i++; } while(i<=n) ;
cout<<"Tong S = "<<s;
}
6
S=1-n
n
3 2 1
) 1 (
3 2 1
1 2 1
# include <iostream.h>
void main () { int n,i;
Trang 3float s=0,m=0,d=1;
cout<<"Nhap vao gia tri cua n : "; cin>>n; for(i=1;i<=n;i++){
m+=i;
s+=d/m;
d=-d;
} cout<<"Tong S = "<<s;
}
7 S=
1 2
1 ) 1 (
7
1 5
1 3
1
n
n
# include <iostream.h>
void main (){
int n,i=1;
float s=0,d=1,m=0;
cout<<"Nhap vao gia tri cua n : " ; cin>>n;
while (i<=n){
m=(2*i)-1;
s+=d/m;
d=-d;
i++; } cout<<"Tong S = "<<s;
}
8 S=
!
2
! 3
2
! 2
2
! 1
1 1
3 2
n
n
# include <iostream.h>
void main (){
int i=1,n;
float s=1,m=1,t=1;
cout<<"Nhap vao gia tri cua n : " ; cin>>n;
do {
m*=i;
t*=2;
s+=t/m;
i++;
} while (i<=n);
cout<<"Tong S = " <<s;
}
9 S=
!
1 ) 1 (
! 4
1
! 3
1
! 2
1
! 1
n
n
# include <iostream.h>
void main () {
Trang 4
int i,n;
float s=0,m=1,d=1;
cout<<"Nhap vao gia tri cua n : "; cin>>n; for (i=1;i<=n;i++){
m*=i;
s+=d/m;
d=-d;
} cout<<"Tong S = "<<s;
}