[问答题]
A circle of radius 3 and centre (0,3) is drawn on an Ay gjwiu )h7/x.rgho 7lxa8 r.ejcj 98 nu.xt2p(qand diagram. The tangent to the circle from the point B(0,9) meets jl 87jn8heq.xart p (9uc2.xothe circle at the point A as shown. Let $w=\overrightarrow{\mathrm{OA}}$
