Question

数学十分大的问题!!!各高手诚邀进入~请睗教!

Answer 1

更新1:

3)点解0.999.....=1? 我知有得证~ 不过0.999.....只系十分接近1而唔系=1 我都知1/9+8/9=1 1/9=0.111... 8/9=0.888... =0.999... 但系都系唔明~请睗教!

3.设0.999...为x x+1=1.999... (x+1)-x=1.999...-(0.999...) =1 所以0.999...=1
3) 1/9=0.111... 8/9=0.888... 9/9=0.999... 9/9=1=0.999...
参考: myself
1) Converse of Theorem is NOT necessary exits. Sorry. I fot the exact form of intercept theorem and hence I cannot prove or disprove the converse here. On the other hand
it is not necessary to memorize the theorem since you can deduce what you need without the theorem. 2) 3 parallel lines are ok but the form of the theorem is not similar to the original one and the putation is much more plicate. 3) 0.99999...... is just another REPRESENTATION (表示方法) of the number 1. The actual theory behind is university level.
ANS Q.3 ONLY GO TO .knowledge.yahoo/question/?qid=7006101602244 LA 2006-12-20 22:30:57 补充： 其实9/9可以等于1或0.99999999999999999.........为什么?因为有一条定理证明0.999999999999999......=1Let x=0.99999999...............10x=9.9999999999........10x-x=9.99999.....-0.99999.......9x=9x=1所以0.9999999.........=1 ..........
参考: .knowledge.yahoo/question/?qid=7006101602244
1) 逆定理问题: 这不一定是对
让我举个日常例子
男人是人
但不是全世界的人是男人... 所以逆定理是有一定的限制... 2) intercept therom 吾系要直线咩@@? 3) 系米有写几位有效数字?
参考: Me