Question

Find the inner product of (4, 9, -3) . (-6, 7, 5) and state whether the vectors are perpendicular.

Answer 1

The answer would be 24, not perpendicular.

This is right, because I can verify that this is correct since I just did the practice :) Hope I was able to help you.

Explanation:

You are given (4, 9, -3) . (-6, 7, 5).

So you first would need to multiply. You would get:

(-6 * 4) + (7 * 9) + (5 * -3)

-24 + 63 - 15

So when you add and subtract those numbers, you would get 24. Since 24 does not equal to 0, these vectors will not be perpendicular.