s=x^2+x^4+..+x^n
Code:
#include"stdio.h"
#include"conio.h"
float tong(float, int);
float luythua(float, int);
void main ()
{
int n;
float x;
printf(" \n Nhap n ");
scanf("%d",&n );
printf(" \n Nhap x ");
scanf("%f",&x );
float kq =tong(x,n);
printf(" Tong := %2f", kq);
getch();
}
float luythua(float x,int n)
{
float t=1;
int i=2;
while(i<=2*n)
{
t=t*x*x;
i=i+2;
}
return t ;
}
float tong(float x, int n)
{
float s=0;
int i =1;
while(i<=n)
{
s= s+luythua(x,n);
i=i+1;
}
return s;
}
Ai biết chỉ dùm nha .thank nhìu nhìu