Which of the following four lines are parallel Are any of them identicalL1: x 1 6t y 1

Chapter 12, Problem 68

(choose chapter or problem)

Which of the following four lines are parallel? Are any of them identical?L1: x 1 6t y 1 3t z 12t 5L2: x 1 2t y t z 1 4tL3: 2x 2 4 4y z 1L4: r 3, 1, 5 t4, 2, 84, 1, 2 x 1 t y

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