Question

For what value of a, A = 2î + aj +k is perpendicular to B = 4î - 2j + 2k
a) 1 b) 2 c) 3 d) 4
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Answer 1

Answer:

5

Explanation:

A.B=0

4*2-2a+2=0

10=2a

a=5

Answer 2

Answer:

when a is 3 a = 2i + aj + k is perpendicular to b = 4i - 2j + 2k

Explanation:

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