1/x+10+1/(x+1)(x+2)+1/(x+2)(x+3)+......+1/(x+9)(x+10)=2
答案:2 悬赏:80 手机版
解决时间 2021-03-24 09:10
- 提问者网友:风月客
- 2021-03-23 18:42
1/x+10+1/(x+1)(x+2)+1/(x+2)(x+3)+......+1/(x+9)(x+10)=2
最佳答案
- 五星知识达人网友:鸽屿
- 2021-03-23 19:37
1/(x+10)+1/(x+1)(x+2)+1/(x+2)(x+3)+......+1/(x+9)(x+10)=2
1/(x+10)+(1/(x+1)-1/(x+2))+(1/(x+2)-1/(x+3))+....+(1/(x+9)-1/(x+10))=2;
1/(x+10)+1/(x+1)-1/(x+2)+1/(x+2)-1/(x+3)+...+1/(x+9)-1/(x+10)=2;
1/(x+10)+1/(x+1)-1/(x+10)=2;
1/(x+1)=2;
x+1=1/2;
∴x=-1/2;
如果本题有什么不明白可以追问,如果满意记得采纳
如果有其他问题请采纳本题后另发点击向我求助,答题不易,请谅解,谢谢。
祝学习进步
1/(x+10)+(1/(x+1)-1/(x+2))+(1/(x+2)-1/(x+3))+....+(1/(x+9)-1/(x+10))=2;
1/(x+10)+1/(x+1)-1/(x+2)+1/(x+2)-1/(x+3)+...+1/(x+9)-1/(x+10)=2;
1/(x+10)+1/(x+1)-1/(x+10)=2;
1/(x+1)=2;
x+1=1/2;
∴x=-1/2;
如果本题有什么不明白可以追问,如果满意记得采纳
如果有其他问题请采纳本题后另发点击向我求助,答题不易,请谅解,谢谢。
祝学习进步
全部回答
- 1楼网友:酒醒三更
- 2021-03-23 20:29
1/(x+1)+1/(x+10)=1/(x+2)+1/(x+9),
1/(x+1)-1/(x+2)=1/(x+9)-1/(x+10)
[(x+2)-(x+1)]/(x+!)(x+2)=[(x+10)-(x+9)]/(x+9)(x+10)
1/(x+1)(x+2)=1/(x+9)(x+10),
(x+1)(x+2)=(x+9)(x+10)
x^2+3x+2=x^2+19x+90,
16x=-88,
x=-11/2
经检验,x=-11/2是方程的根
我要举报
如以上问答信息为低俗、色情、不良、暴力、侵权、涉及违法等信息,可以点下面链接进行举报!
大家都在看
推荐资讯