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\[ \Large \frac {\color{red}1} {\color{blue}2} \times \frac {\color{red}2} {\color{blue}3} \times \frac {\color{red}3} {\color{blue}4} \times \frac {\color{red}4} {\color{blue}5} \times \ldots \times \frac { \color{red}9}{ \color{blue}{10}} = \ ? \]

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