From A, A 1, A2 and A3, we can see that the Y coordinate is unchanged, and the X coordinate is 2 to the 0 th power, 2 to the 1 power, 2 to the 2 nd power and 2 to the 3 rd power respectively. It can be concluded that the coordinate of an is (2,3 to the n power).

It can be seen from b, B 1, B2 and B3 that the y coordinate is unchanged, and the x coordinate is the quadratic power of 1, the quadratic power of 2, the quadratic power of 3 and the quadratic power of 4 respectively. It can be concluded that the coordinate of Bn is (2 n+ 1 power, 0).

So (1)A4 coordinate is (16,3 3) B4 coordinate is (32,0).

(2) 2) The coordinate of an is (2 to the power of n, 3) 3) The coordinate of BN is (2 to the power of n+ 1 0).