 Solution

ID: past-exam-of-the-mathematics-course-of-the-year-1-of-the-natural-sciences-course-of-the-university-of-cambridge/2021/paper-2/11/a/solution

The evaluated position vectors are

r_{1} (1) = (2, 1, 0)

and

r_{2} (- 1) = (- 1, - 1, 0)

. Their difference is

(3, 2, 0)

∥ r_{1} (1) - r_{2} (- 1) ∥ = 3^{2} + 2^{2} = 13 .

 New to topics? Read the docs here!