最后是......97又98/99后加98又99/100
参考资料:百度一下
(3又1\/3+5又2\/4+7又3\/5+...+97又48\/50)\/(1又2\/3+2又3\/4+3又4\/5+...
(3又1\/3+5又2\/4+7又3\/5+...+97又48\/50)\/(1又2\/3+2又3\/4+3又4\/5+...+48又49\/50)=(10\/3+22\/4+38\/5+...+4898\/50)\/(5\/3+11\/4+19\/5+...+2449\/50)=2×(5\/3+11\/4+19\/5+...+2449\/50)\/(5\/3+11\/4+19\/5+...+2449\/50)=2 ...
...97又98\/99+98又99\/100)\/3又1\/3+5又2\/4+7又3\/5+...+195又97\/99+197...
(98又99\/100)\/(197又98\/100)=(9899\/100)\/(19798\/100)=1\/2 (1又2\/3+2又3\/4+3又4\/5+...+97又98\/99+98又99\/100)\/(3又1\/3+5又2\/4+7又3\/5+...+195又97\/99+197又98\/100)=(1又2\/3+2又3\/4+3又4\/5+...+97又98\/99+98又99\/100)\/[2(1又2\/3+2又3\/4+3...
计算ti。求解答
(1又2\/3+2又3\/4+3又4\/5+...97又98\/99+98又99\/100)\/(3又1\/3+5又2\/4+7又3\/5+...+195又97\/99+197又99\/100)=(1又2\/3+2又3\/4+3又4\/5+...97又98\/99+98又99\/100)\/【2×(1又2\/3+2又3\/4+3又4\/5+...97又98\/99+98又99\/100)】=1\/2 ...
(3又1\/3+5又2\/4+7又3\/5+...+57又28\/30)\/(1又2\/3+2又3\/4+3又4\/5+...
(3又1\/3+5又2\/4+7又3\/5+...+57又28\/30)\/(1又2\/3+2又3\/4+3又4\/5+...28又29\/30)-1 =(2又4\/3+4又6\/4+6又8\/5+...+56又58\/30)\/(1又2\/3+2又3\/4+3又4\/5+...28又29\/30)-1 =2-1 =1
3又(1\/3) +5又(2\/4) +7又(3\/5) +9又(4\/6) 分之 1又(2\/3)+ 2又(3\/4...
解: 3又(1\/3) +5又(2\/4) +7又(3\/5) +9又(4\/6)=10\/3+22\/4+38\/5+58\/6 =20\/6+58\/6+110\/20+152\/20=78\/6+262\/20=13+13.1=26.1 1又(2\/3)+ 2又(3\/4)+ 3又(4\/5) +4又(5\/6)=5\/3+11\/4+19\/5+29\/6 =10\/6+29\/6+55\/20+76\/20=39\/6+131\/20=6.5+...
(1又2\/3+2又3\/4+3又 4\/5)÷3又 1\/3+5又2\/4+7又3\/5)的简便方法?
(1又2\/3+2又3\/4+3又 4\/5)÷(3又 1\/3+5又2\/4+7又3\/5)=(5\/3+11\/4+19\/5)÷(10\/3+22\/4+38\/5)=(5\/3+11\/4+19\/5)÷【2x(5\/3+11\/4+19\/5)】=(5\/3+11\/4+19\/5)÷(5\/3+11\/4+19\/5)÷2 =1÷2 =0.5 ...
(1又2\/3+2又3\/4+4又5\/6)*(3又1\/3+5又2\/4+7又3\/5+9又4\/6算,请写过程
(1又2\/3+2又3\/4+4又5\/6)÷(3又1\/3+5又2\/4+7又3\/5+9又4\/6),被除数、除数都乘以60,得 5(12+8+24+9+48+10)÷(180+20+300+30+420+36+540+40)=5*111÷1566 =185\/522.
(三又三分之一+五又四分之二+七又五分之三+九又六分之四)÷(一又三...
(三又三分之一+五又四分之二+七又五分之三+九又六分之四)÷(一又三分之二+二又四分之三+三又五分之四+四又六分之五)=(3 + 3分之1 + 5 + 2分之1 + 8 - 5分之2 + 10 - 3分之1)÷(2 - 3分之1 + 3 - 4分之1 + 4- 5分之1 + 5- 6分之1)=(26 + 10...
3\/1x2x3+5\/2x3x4+7\/3x4x5+...+197\/98x99x100
即:3\/(1x2x3)+5\/(2x3x4)+7\/(3x4x5)+..(2n+1)\/((n)(n+1)(n+2))..+197\/(98x99x100) n=1,2...98 对式子中的任意一项:(2n+1)\/((n)(n+1)(n+2))=(n+(n+1))\/((n)(n+1)(n+2))=1\/((n+1)(n+2))+1\/(n(n+2))对上式中的:1\/((n+1)(n+2))...
1又2\/3+2又3\/4+3又4\/5+...+1996又1997\/1998+1997又1998\/1999除以5+8...
本题分母项应该有误,如果是“除以6+8又1\/4+11又2\/5+...”就可解,否则基本无简便算法。整理分子项 1又2\/3+2又3\/4+3又4\/5+...+1996又1997\/1998+1997又1998\/1999 =2-1\/3+3-1\/4+4-1\/5+...+1997-1\/1998+1998-1\/1999 =(2+3+...+1997+1998) -(1\/3+1\/4+1\/5+.....