2=2 1、4=22、8=23,
∴An(2n,3),
∫B(2,0),B 1(4,0),B2(8,0),B3( 16,0),
2=2 1、4=22、8=23, 16=24,
∴Bn(2n+ 1,0).
I answered the second question for you. Ask yourself to bring it in the first question. If not, you can ask me again.