Suppose A=3i-2j+k, B=-i-4j+3k&C is a vector lying along x-axis with the property that A.(B+C)=0. Then find vector C

Answer 1

B+C = (x-1)i-4j+3k
A•(B+C) = 3(x-1)i
so x = 1 and C = 1i