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; }