TRONG KHÔNG GIAN OXYZ, CHO ĐIỂM $ A\LEFT( {1;2;3} \RIGHT)$ VÀ ĐƯỜNG THẲNG $ D:\FRAC{{X – 3}}{2} = \FRAC{{Y – 1}}{1} = \FRAC{{Z + 7}}{{ – 2}}$. ĐƯỜNG THẲNG ĐI QUA A, VUÔNG GÓC VỚI D VÀ CẮT TRỤC OY CÓ PHƯƠNG TRÌNH LÀ
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Level:
Medium
Question Types: Multiple choice
Answers:
- $ \\\left\\\{ \\\begin{array}{l} x = 1 - t\\\\\\ y = 2 - 4t\\\\\\ z = 3 - 3t \\\end{array} \\\right..$
- $ \\\left\\\{ \\\begin{array}{l} x = - 1 + 2t\\\\\\ y = - 2t\\\\\\ z = t \\\end{array} \\\right..$
- $ \\\left\\\{ \\\begin{array}{l} x = t\\\\\\ y = - 2 + 4t\\\\\\ z = 3t \\\end{array} \\\right..$
- $ \\\left\\\{ \\\begin{array}{l} x = - 1 + 2t\\\\\\ y = 2t\\\\\\ z = 3t \\\end{array} \\\right..$