神马作文网数列极限求和[A/(B^0)+A/(B^1)+A/(B^2)+A/(B^3)+A/(B^4)+.+A/(B^n)]求和,
![数列极限求和[A/(B^0)+A/(B^1)+A/(B^2)+A/(B^3)+A/(B^4)+.+A/(B^n)]求和,](/uploads/image/z/19716755-59-5.jpg?t=%E6%95%B0%E5%88%97%E6%9E%81%E9%99%90%E6%B1%82%E5%92%8C%5BA%2F%28B%5E0%29%2BA%2F%28B%5E1%29%2BA%2F%28B%5E2%29%2BA%2F%28B%5E3%29%2BA%2F%28B%5E4%29%2B.%2BA%2F%28B%5En%29%5D%E6%B1%82%E5%92%8C%2C)
利用等比数列求和公式证明：(a-b)(a^n+a^(n-1)b+a^(n-2)b^2+……+b^n)=a^(n+1)-b
利用等比数列求和公式证明：（a+b）(a^n+a^(n-1)b+a^(n-2)b^2+.+b^n)=a^(n+1)-b^
求和的平方公式（a+b)^2
数列极限计算计算lim（(a+b)/ab + (a^2+b^2)/a^2b^2 + … +(a^n+b^n)/a^nb^
a+b>a-b,
(a-b)(a b)
a/b-b/a
计算：((a+b)(a-b)-(a-b)^2+2b(a-b))/4(a-b)
A=B+B+B+B+B+B+B+B+B+B+B+B+B+B+B A-B×3=C C+2×7+2=1
若a>0,b>0,则(a^n-b^n)/(a^n+2b^n)的极限不可能为
1.（a-b)^2（b-a)^3(a-b)^-4
a-b>a,a+b