S= 1
-
2222
1
22
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
2
2
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; }
3. S=
xxxx
# include <iostream.h>
# include <math.h>
void main () {
int n,i;
float x,s=0;
cout<<"Nhap vao gia tri cua n : "; cin>>n;
cout<<"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
1
1
# 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;
whi
le (i<=n){
m=2*i;
s+=d/m;
d=
-
d;
i++;
}
cout<<"Tong S="<<s;
}
5. S=1+
222222222
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
1
1
# include <iostream.h>
void main () {
int n,i;
float 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
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=(2*i)
-
1;
s+=d/m;
d=
-
d;
i++; }
cout<<"T
ong S = "<<s;
}
8. S=
!
2
!
3
2
!
2
2
!
1
1
1
32
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
1
1
n
n
# include <iostream.h>
void main () {
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;
}