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.