Question

Prove the vector I + 2j +5k and -2i+4j+2k are mucttuly perpendicular

Answer 1

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Step-by-step explanation:

ANSWER ::

Let

A = i + 2j +5k

B = -2i+4j+2k

So

A . B = - 2 + 8 + 10 = 0

Hence the proof follows