Question

If (mi -3j + 4k) . (2i + 4j + m k) = 0 then the value of m is

(i) 3 (ii) -2 (iii) 2 (iv) None of these​

Answer 1

iii) 2

Step-by-step explanation:

2m - 12 + 4m = 0

6m = 12

m = 12/6

m = 2