(1+1/5)(1+1/5²)(1+1/5∧4)……(1+1/5³²)
(1+1/5)(1+1/5²)(1+1/5∧4)……(1+1/5³²)
(1-1/2²)(1-1/3²)(1-1/4²)(1-1/5²)……(1-1/2
(1²+3²+5²+……+99²)-(2²+4²+6
求值(2²+4²+6²+……+2000²)-(1²+3²+5
求和:1²-2²+3²-4²+5²-6²+…+99²
1-2²+3²-4²+5²-6²+……+99²-100
初二数学:计算1²-2²+3²-4²+5²…………+999²
计算1-2²+3²-4²+5²-6²+…+99²-100
观察规律:1=1²;1+3=2²;1+3+5=3²;1+3+5+7=4²;…则1
(5-1)/5+(5²-1)/5²+(5³-1)/5³+.+(5的n次方-1)/
计算:1+5+5²+5³+……+5的2010次方+5的2011次方的值
1/5+1/5²+1/5³+.+1/5的N次方=?