1-2²+3²-4²+5²-6²+······+99²-10
1-2²+3²-4²+5²-6²+······+99²-10
1²-2²+3²-4²+5²-6²+····+99²
直接求和:-1²+2²-3²+4²-5²+6²-······
1²+2²+3²+4²+5² +···+n²=?
用简便方法计算1-2²+3²-4²+5²-6²+······+99
100²-99²+98²-97²+·····+2²-1²=?
设计一个算法,计算1²-2²+3²-4²···+99²-100
计算1×2²+2×3²+3×4²+4×5²+······+18×19²
100²-99²+98²-97²+96²-······-1²
计算:2014²-2013²+2012²-2011²+·········4
2²+4²+6²+8²+···+100²=是多少
2014²-2013²+2012²-2011²+···+4²-3