您的位置: 首页  >  作业答案  >  其他  >  1/(x+10)(x+11)+1/(x+11)(x+12)+1/(x+12)(x+13)+1/x13=1/14

1/(x+10)(x+11)+1/(x+11)(x+12)+1/(x+12)(x+13)+1/x13=1/14

分类: 作业答案 • 2021-12-24 16:35:35
问题描述：

1/(x+10)(x+11)+1/(x+11)(x+12)+1/(x+12)(x+13)+1/x
13=1/14

答

1/(x+10)(x+11)+1/(x+11)(x+12)+1/(x+12)(x+13)+1/(x+13)=1/14
∴1/(x+10)-1/(x+11)+1/(x+11)-1/(x+12)+1/(x+12)-1/(x+13)+1/(x+13)=1/14
∴1/(x+10)=1/14
∴x=4

相关推荐