CMR: $\frac{1}{3}$ -$\frac{2}{3^{2} }$ +$\frac{3}{3^{3} }$ -$\frac{4}{ 3^{4}}$+...+$\frac{99}{3^{99} }$ - $\frac{100}{3^{100}}$ <$\frac{3}{16}$

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