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#include <stdio.h> #include <math.h> #define f(x) (1 + x * x * x) int main() { int i, n; float a, b, h, I, P; printf("Enter lower limit: "); scanf("%f", &a); printf("Enter upper limit: "); scanf("%f", &b); printf("Enter number of subintervals: "); scanf("%d", &n); h = (b - a) / n; I = f(a) + f(b); for (i = 1; i < n; i++) { P = a + i * h; if (i%2==0){ I=I+2*f(P); } else { I=I+4*f(P); } } I = (h / 3) * I; printf("The required value of the integration is: %.4f\n", I); return 0; }
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