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#include<stdio.h> #include<conio.h> #include<math.h> int main() { int i, n; float x, S, T; long M, N; printf("\nNhap x: "); scanf("%f", &x); do { printf("\nNhap n(n >= 0) : "); scanf("%d", &n); if(n < 0) { printf("\n N phai >= 0. Xin nhap lai !"); } }while(n < 0); S = 1; N = 1; i = 1; while(i <= n) { T = pow(x, (2 * i )); M = i * 2; N = N * M * (M - 1); S = S + T/N; i++; } printf("\nTong la %f", S); getch(); return 0; }
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