计算:1x1!+2x2!+3x3!+.+2009x2009!+2010x2010!
问题描述:
计算:1x1!+2x2!+3x3!+.+2009x2009!+2010x2010!
答
=1²+2²+3²+.+2009²+2010²
=(1²+2010²)*2010除以2
=(1+4040100)*1005
=4060301505