作业帮1/2+1/8+1/24+.+1/9800
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1/2+1/8+1/24+.+1/9800
1/2+1/8+1/24+.+1/9800
1/2+1/8+1/24+.+1/9800
原式=1/2+(1/8+1/24+···+1/9800)
=1/2+1/2*(1/2-1/4+1/4-1/6+···+1/98-1/100)
=1/2+1/2*49/100
=1/2+49/50
=25/50+49/50
=74/50
=37/25
望采纳
500(1+x)2=980计算
1/2+1/8+1/24+.+1/9800
1吨30千克+980千克?
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求解24(x+1)^2=8
(1+1/3)*(1+1/8)*(1+1/15)*(1+1/24)*.*(1+1/9800)
1/3+1/8+1/15+1/24+.1/9800
(1/8+1/15+1/24+1/35+1/48)*2
1/2+1/8+1/24+1/48+1/80要简便哦
1/2 +1/8+1/24+1/48+1/80怎么做