文献[1]选登了一道安徽两所示范高中联考试题,并给出了参考答案.试题有一种摇奖盘是将一单位圆分成n(n≥3)个均匀的扇形区域构成的(如图1所示),现需将这n个扇形区域用三种不同颜色涂色,并要求三种颜色都要使用,且相邻的区域不能够同色.如果把含有n(n≥3)个扇形区域摇奖盘的涂色 The literature [1] selected a sample of two high school couplets exams in Anhui and gave the reference answers. There is a kind of pan dial for the examination to divide a unit circle into n (n≥3) uniform fan-shaped regions ( As shown in Figure 1), the n fan-shaped areas need to be painted in three different colors, and all three colors are required to be used, and the adjacent areas cannot be the same color. If you include n (n≥3) Coloring of the sectoral pannel