Bài 23

u1 = float(input("Nhap u1: "))
q  = float(input("Nhap cong boi q (q != 0): "))
n  = int(input("Nhap so hang n: "))

hang = [u1 * q**i for i in range(n)]

print("Cac so hang:")
print("  " + "  ".join(str(round(x, 4)) for x in hang))

if q == 1:
    Sn = n * u1
else:
    Sn = u1 * (q**n - 1) / (q - 1)

print(f"S{n} = {round(Sn, 4)}")