六年级数学题1/(1*2*3)+1/(2*3*4)+1/(3*4*5)+1/(4*5*6)+1/(5*6*7)+.+1/(48*49*50)=?诉求,

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/14 11:01:48
六年级数学题1/(1*2*3)+1/(2*3*4)+1/(3*4*5)+1/(4*5*6)+1/(5*6*7)+.+1/(48*49*50)=?诉求,六年级数学题1/(1*2*3)+1/(2*3*4)

六年级数学题1/(1*2*3)+1/(2*3*4)+1/(3*4*5)+1/(4*5*6)+1/(5*6*7)+.+1/(48*49*50)=?诉求,
六年级数学题1/(1*2*3)+1/(2*3*4)+1/(3*4*5)+1/(4*5*6)+1/(5*6*7)+.+1/(48*49*50)=?诉求,

六年级数学题1/(1*2*3)+1/(2*3*4)+1/(3*4*5)+1/(4*5*6)+1/(5*6*7)+.+1/(48*49*50)=?诉求,
=1/2*(1/1*2-1/2*3+1/2*3-1/3*4+……+1/48*19-1/49*50)
=1/2*(1/1*2-1/49*50)
=306/1225