来自金加梁的问题
B1=-1B2=-2B3=-6B4=-22B5=-86求Bn
B1=-1
B2=-2
B3=-6
B4=-22
B5=-86求Bn
1回答
2020-11-16 14:45
B1=-1B2=-2B3=-6B4=-22B5=-86求Bn
B1=-1
B2=-2
B3=-6
B4=-22
B5=-86求Bn
B2=B1-1=B1-4^0=B1-4^(2-2)B3=B2-4=B2-4^1=B2-4^(3-2)B4=B3-16=B3-4^2=B3-4^(4-2)B5=B4-64=B4-4^3=B4-4^(5-2)……………………B(n)=B(n-1)-4^(n-2)全部加起来得:B(n)=B1-[4^0+4^1+……+4^(...