Q25. Find the value of 'a' for which the vectors (i - 2j + k), (i + aj - k), and (3i + 7j + k) are coplanar.Mathematics — NUST Mock By Dogers 3 — Question 25 of 200A. 5/3B. 3/2C. 1D. 11Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →