#include<stdio.h>
#include<conio.h>
#include<math.h>
float sqrt3(float x)
{
if(x == 0)
return 0;
if(x < 0)
return (-sqrt3(-x));
return (exp((log(x)/3)));
}
int main()
{
float x;
printf("\nNhap x: ");scanf("%f", &x);
x = sqrt3(x);
printf("ket qua = %.2f", x);
getch();
return 0;
}