>>434
Q1

#include <stdio.h>

int main(void){
int i;
double ans[11];

ans[0] = 1.0;
printf("X_ 1 = 0.000000\n");

for(i=1; i<10; i++){
ans[i] = (ans[i-1] + (2/ans[i-1])) / 2;
printf("X_%2d = %lf\n", i, ans[i]);
}

return 0;
}