1/2*4+1/4*6+1/6*8+…?1/98*100
1/2*4+1/4*6+1/6*8+…?1/98*100
日期:2021-10-17 10:42:14 人气:1
1/2*4+1/4*6+1/6*8+…?1/98*100
=(1/2-1/4+1/4-1/6+1/6-1/8+……+1/98-1/100)/2
=(1/2-1/100)/2
=49/200
=(1/2-1/4+1/4-1/6+1/6-1/8+……+1/98-1/100)/2
=(1/2-1/100)/2
=49/200