Let |a|=3 and |b|=4. The value of μ for which the vectors a+μb and a−μb will be perpendicular is
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= ___