#include <stdio.h>
#include <math.h>
#define a 5.5
#define c 2.8
#define z 4.21
#define y 28.3
#define X1 3.4
#define X2 6.6
#define DX 0.11
int main() {
int count = 0;
for(float x=X1; x<=X2; x+=DX) {
float b=5*((y-x)*sqrt(y-z*x))/(1+(y+pow(x,2))*log(z));
if (a > b && b > c) {
count++;
printf("b = %f\n", b);
}
}
printf("Количество: %d\n", count);
}