作者kimoqueen (AT苦海何時能解脫~ @_@)
看板GMAT
標題[問題] 想請教幾題數學...
時間Mon Dec 15 16:32:09 2008
1.what is the value of x in the equation x=1+ x/2 + x/4 + x/8 + x/16?
若兩邊同乘16, 不就變成 16x = 16 + 16x 這樣x 能解得出來嗎?
因為答案是16有點想不通...
2. Is m=0
(1)|m| = m
(2)|m| = -m
Answer: C
3. If lines k, m and n are in the same plane, is line m parallel to line n?
(1)Line m is parallel to line k.
(2)Line n is not parallel to line k.
Answer: E
麻煩解說一下，謝謝各位大大~ 感恩~
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推 colakane:Q1:同乘16 16x=16+8x+4x+2x+x ->16x=16+15x x=16 12/15 16:46
→ colakane:Q2: (1)m>=0 (2)m<=0 取集合 12/15 16:49
推 colakane:Q3:我自己感覺是C 12/15 16:54
→ kimoqueen:不好意思唷，第一題太不小心了，@@ 第三題我確定是E.. 12/15 16:57
→ kimoqueen:答案有確認過，只是解題無法說明清楚來說服自己... 12/15 16:58
推 colakane:看到你下面的推文了，應該是重疊，也解了我疑惑，謝謝 12/15 17:08