Given that the points \( P(3,2,-4), Q(5,4,-6) \) and \( R(9,8,-10) ...
Given that the points \( P(3,2,-4), Q(5,4,-6) \) and \( R(9,8,-10) \) are collinear. Find the ratio in which \( \mathrm{Q} \) divides \( P R \).
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