简算:1/2004+2/2004+3/2004+4/2004+.+2002/2004+2003/2004SOS!
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/27 04:21:50
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简算:1/2004+2/2004+3/2004+4/2004+.+2002/2004+2003/2004SOS!
简算:1/2004+2/2004+3/2004+4/2004+.+2002/2004+2003/2004
SOS!
简算:1/2004+2/2004+3/2004+4/2004+.+2002/2004+2003/2004SOS!
1/2004+2/2004+3/2004+4/2004+.+2002/2004+2003/2004=1/2004*(1+2+……+2003)
=1/2004*(1+2003)*2003/2=2003/2
1+2003=2004 首尾相加 就是1
一共有1到2003 共1002对。结果就是1002*1=1002
=(1*2+2*3+3*4+4*5+5*6)/2004=70/2004=35/1002