# math

posted by
**karla** on
.

two vectors are defined as a=2i+xj and b=i-4j. find value of x if

a) the vectors are parallel

b) the vectors are perpendicular

posted by
**karla** on
.

two vectors are defined as a=2i+xj and b=i-4j. find value of x if

a) the vectors are parallel

b) the vectors are perpendicular