1415+3435+6263+9899+142143+194195+254255+3...

优质解答

答：

14/15+34/35+62/63+98/99+142/143+194/195+254/255+322/323

=14/(3×5)+34/(5×7)+62/(7×9)+98/(9×11)+142/(11×13)+194/(13×15)+254/(15×17)+322/(17×19)

=7/3-7/5+17/5-17/7+31/7-31/9+49/9-49/11+71/11-71/13+97/13-97/15+127/15-127/17+161/17-161/19

=7/3+(2+2+2+2+2+2+2)-161/19

=7/3+14-161/19

=16+1/3-8-9/19

=8+(19-27)/57

=8-8/57

=448/57

其他回答

是分数么？

其他类似问题

问题1：14/15+34/35+62/63+98/99+142/143+194/195+254/255+322/323+398/399+482/483=?[数学科目]

每一项变成1－一个数.如14/15=1-1/15

然后原式＝10-1/15-1/35-1/63-.-1/483

=10-1/(3*5)-1/(5*7)-.-1/(21*23)

=10-1/2(1/3-1/5+1/5-1/7+.+1/21-1/23)

=10-1/2*(20/69)

=680/69

问题2：2/3+14/15+34/35+62/63+98/99=[数学科目]

=1-1/3+1-1/15+1-1/35+1-1/63+1-1/99

=5-(1/1×3+1/3×5+1/5×7+1/7×9+1/9×11)

=5-1/2×(1-1/3+1/3-1/5+1/5-1/7+1/9-1/9-1/11)

=5-1/2×(1-1/11)

=50/11

问题3：2/3+14/15+34/35+62/63+98/99+142/143=?[数学科目]

6-1/3-1/15-1/35-1/63-1/99-1/143=6-6/13=72/13

问题4：我的是有线宽频,是静态IP的IP为10.47.99.41,子网掩码255.255.255.0网关10.47.99.254水星mw54r我的是有线宽频,是静态IP的IP为10.47.99.41,子网掩码255.255.255.0,网关10.47.99.254,DNS10.41.1.201,请问用水星mw54r无线路

连接方式有3种 PPPOE 动态 静态

你使用静态

IP设置10.47.99.41

子网掩码255.255.255.0

网关WAN 10.47.99.254

LAN口 192.168.1.1

DNS 10.41.1.201

然后把你电脑的TCP IP协议设置 ip 192.168.1.253

子网掩码255.255.255.0

网关192.168.1.1

dns10.41.1.201

问题5：8-2/3-2/15-2/35-2/63-2/99-2/143-2/195-2/255 巧算8-2/3-2/15-2/35-2/63-2/99-2/143-2/195-2/255 巧算[数学科目]

=8-(1-1/3)-(1/3-1/5)-(1/5-1/7)-(1/7-1/9)-(1/9-1/11)-(1/11-1/13)-(1/13-1/15)-(1/15-1/17)

=8-1+1/17

=7+1/17

=120/17