If `a=2i+2j+2k,b=5i-3j+k`, then the length of the component vector of b perpendicular to a is

If bar(a)=2bar(i)+bar(j)+2bar(k),bar(b)=5bar(i)-3bar(j)+bar(k), then the length of the component vector of b perpendicular to a is

1.Find the value(s) of x for which the angle between the vectors xi3j-k and xi xi-k is obtuse.2. If a=j+k and b=2i-j+3k then find (i) component of b along to a (ii) component of b perpendicular to a

If bar(a)=7i+2j+k,bar(b)=2j+k-i, then component of bar(a) perpendicular to bar(b) is :

If a = 3i - 2j + k and b = i + 2j + 5k, then the unit vector along a - b is

If a = 3i - 2j + k, b = -i + j + k then the unit vector parallel to the vector a + b is