Question

please sovle this question please

Answer 1

perpendicular means dot product of these two vector will be zero.
vector a. vector b=0
6-8-2x =0
-2=2x
x=-1

Answer 2

very simple !!!

since vectors are || so


we use trick or formula :-

a1 / a2= b1/b2 = C1/C2



so , 2/3 = 4/-2= -2/x

=> 4/-2 = -2/ x

x = 1

hope it help you

thanks!
Ranjan Kumar