[填空题]
Three vectors are shown in Fig. below. :zyx/+i(*wni ywyh 9eym ; jp(u7w1 ayThiro4,l-6 ih2 gmeo x2msdbz26c *0h jbeir magnitudes are given in arbitrary units. Determine the sum of the three vectors. Give the resultant in terms of (a) components, (b) go2lbxd,22m i-ichh* sbrmeoj z6604magnitude and angle with the x axis.