Question

Find the inner product for (3, 1, 4) x (2, 8, -2) and state whether the vectors are perpendicular.
a. 6; no
b. 6; yes
c. 3; no
d. 3; yes

Answer 1

Answer:

  a.  6; no

Step-by-step explanation:

(3, 1, 4)·(2, 8, -2) = (3)(2) +(1)(8) +(4)(-2) = 6

The result is non-zero, so the vectors are NOT perpendicular.

Answer 2

Answer:

The person over there is correct, it is A.

Step-by-step explanation:

I take the practice.