\(m:\left\{ {\begin{array}{*{20}{c}}{x = 1 - t}\\{y = 2 - \sqrt 3 t}\end{array}} \right.\)và \(n:\left\{ {\begin{array}{*{20}{c}}{x = 4 - t'}\\{y = \sqrt 3 t'}\end{array}} \right.\).
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