1;Tính:

A=2²+4²+6²+8²+...+100².

B=1³+2³+3³+4³+...+100³.

2;Cho A=\(\frac{1}{1.2}+\frac{1}{3.4}+\frac{1}{5.6}+...+\frac{1}{2005.2006}\)

B=\(\frac{1}{1004.2006}+\frac{1}{1005.2006}+...+\frac{1}{2006.2006}\)

Tính A : B