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1/(2+4)+1/(4+6)+1/(6+8)+…1/(2010+2012)怎么做
人气:162 ℃ 时间:2020-03-31 18:51:06
解答
1/(2*4)+1/(4*6)+1/(6*8)+…1/(2010*2012)
=(1/2-1/4+1/4-1/6+1/6-1/8+……+1/2010-1/2012)÷2
=(1/2-1/2012)÷2
=1005/2012÷2
=1005/4024*是加还是乘题目有误,必须是*(乘法)才能计算
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