Question

The vector P = a1 +aj +3k and 8 =
a 1-2 j-k pechendicular to each
other. Then positive value of 'a' is
are​

Answer 1

$p = a_1 + a_j + 3k \\ 8 = a_1 - 2_j - k$

Adding both equations,

$p + 8 = a_1 + a_j + 3k + a_1 - 2_j - k$

$p + 8 = 2a_1 + a_j - 2_j + 2k$

Therefore,

positive value of a = 2

Answer 2

Answer:

Thanks for answering my question