0 votes 0 votes The value of t for which A+ tB is perpendicular to C where A = i +2j + 3k, B = -i+2j+k and C = 3i+ j (a) 5 (b) 4 (c) 12 (d) 0 Linear Algebra isro-mech engineering-mathematics + – sh!va asked Mar 7, 2017 • edited Mar 8, 2019 by Naveen Kumar 3 sh!va 343 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.