initial

1sem/adaptation courses/4/12.cpp

@@ -0,0 +1,25 @@
+// ac_4_12.cpp
+// Горбацевич Андрей
+#include <iostream>
+#include <cmath>
+using namespace std;
+
+double ak(double x, int k) {
+    return sqrt(x*x + pow(sin(k*M_PI_4), 2));
+}
+
+double sum(double x, int N) {
+    double out = 0;
+    for (int k = 1; k <= N; k++) {
+        out += ak(x, k);
+    }
+    return out;
+}
+
+int main() {
+    double x;
+    int N;
+    cout << "x, N >>>";
+    cin >> x >> N;
+    cout << "S= " << sum(x, N) << endl;
+}

1sem/adaptation courses/4/13.cpp

@@ -0,0 +1,30 @@
+// ac_4_13.cpp
+// Горбацевич Андрей
+#include <iostream>
+#include <cmath>
+using namespace std;
+
+double xmi(double x, int N) {
+    double out = 0;
+    for (int i = 1; i <= N; i++) {
+        out += 1/pow(x, i);
+    }
+    return out;
+}
+
+double xi(double x, int N) {
+    double out = 1;
+    for (int i = 0; i <= N; i++) {
+        out *= (x - i);
+    }
+    return out;
+}
+
+int main() {
+    double x;
+    int N;
+    cout << "x, N >>>";
+    cin >> x >> N;
+    cout << "S= " << xmi(x, N) << endl;
+    cout << "P= " << xi(x, N) << endl;
+}

1sem/adaptation courses/4/14.cpp

@@ -0,0 +1,25 @@
+// ac_4_14.cpp
+// Горбацевич Андрей
+#include <iostream>
+#include <cmath>
+using namespace std;
+
+double inline ai(int i) {
+    return ((i%3 == 0)? (i / 3.) : (i / (i - 3.)));
+}
+
+double sai(int i) {
+    double out = 0;
+    for (int k = 1; k <= i; k++) {
+        auto fr = ai(k);
+        out += pow(fr, 2);
+    }
+    return out;
+}
+
+int main() {
+    int N;
+    cout << "N >>>";
+    cin >> N;
+    cout << "S= " << sai(N) << endl;
+}