Question

If a vector 2i + 3j + 8k is perpendicular to the vector 4i - 4j + ɑk , then
$\large \bold \pink{Find \: the \: value \: of \: ɑ.}$
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Answer 1

Step-by-step explanation:

refer the above image mate

Answer 2

Answer A

=2i+3j+8k

B

=4i−4j+ak

Since

A

and

B

are perpendicular

A

.

B

=0

(2i+3j+8k)(4i−4j+ak)

8−12+8a=0

a=

8

4

=

2

1