upd

course2/sem3/exam/scripts/2.py

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+import numpy as np
+import matplotlib.pyplot as plt
+
+E = 1.0   
+r = 1.0   
+
+R = np.linspace(0.001, 5, 500)
+
+P = E**2 * R / (R + r)**2
+
+plt.plot(R, P)
+plt.xlabel("R")
+plt.ylabel("P(R)")
+plt.grid(True)
+
+plt.savefig("2.png", dpi=300, bbox_inches="tight")
+plt.show()
+