The components of a vector →a along the perpendicular to the non-zero vector →b are respectively
Nonzero vectors →a,→b,→c satisfy →a.→b =0, (→b−→a).(→b+→c) = 0 and 2 |→b+→c|=|→b−→a|.
If = →a=μ→b+4→c then μ = ______