如题所述
第1个回答 2011-04-26
#include<stdio.h>
void main()
{
int i,n,k,j;
double sum = 0, x;
k = 1;
x = 2.5;
j = 1;
n = 2;
for(i=1; i<=2*n-1; i += 2)
{
sum += x * k /j;
x = x*6.25;
j = j*(i+1)*(i+2);
k = -k;
}
printf("%lf\n", sum);
}追问
void main()
{
int i,n,k,j;
double sum = 0, x;
k = 1;
x = 2.5;
j = 1;
n = 2;
for(i=1; i<=2*n-1; i += 2)
{
sum += x * k /j;
x = x*6.25;
j = j*(i+1)*(i+2);
k = -k;
}
printf("%lf\n", sum);
}追问
你能把跌代公式写出来吗 能用C++写吗
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