Cho abc = 2. Tính M = \(\frac{2}{ac + a^2}\) + \(\frac{b}{bc + b + 1}\) + \(\frac{2C}{ac + 2c + 2}\)

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Cho abc = 2 Tính

M = \(\frac{2}{ac + a^2}\) + \(\frac{b}{bc + b + 1}\) + \(\frac{2C}{ac + 2c + 2}\)