Question

Which of the following pairs of vectors sum of their magnitudes does NOT equal the magnitude of their sum?

Answer 1

Allowed to pick more than one option

Answer 2

Find each of the magnitudes and add them together, for each pair of vectors.

Find the vector sum for each pair of vectors first, then find the magnitude.

Answer 3

So for the first one would it be \[\sqrt{56}\]

Answer 4

and then \[\sqrt{104}\] @agent0smith so the first answer would be marked as no

Answer 5

I don't know, be more clear about what you're working out. What is sqrt56?

1. The magnitude of A is sqrt20, and B is 6, so the sum of their magnitudes is 6+sqrt20

Their sum is (2, 10) so the magnitude is sqrt104, clearly not equal to 6+sqrt20.

Do the same for the others.