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Question

Which of the following pairs of lines are per-

pendicular?

(a) x = 2 + 2t

y = −3 − 3t

z = 4 + 4t

and

x = 2 + t

y = 4 − t

z = 5 − t

(b) x = 3 − t

y = 4 + 4t

z = 2 + 2t

and

x = 2t

y = 3 − 2t

z = 4 + 2t

Tagged in

Math

Algebra

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