作者kimoqueen (AT苦海何时能解脱~ @_@)
看板GMAT
标题[问题] 想请教几题数学...
时间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?
若两边同乘16, 不就变成 16x = 16 + 16x 这样x 能解得出来吗?
因为答案是16有点想不通...
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
麻烦解说一下，谢谢各位大大~ 感恩~
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1F：推 colakane:Q1:同乘16 16x=16+8x+4x+2x+x ->16x=16+15x x=16 12/15 16:46
2F：→ colakane:Q2: (1)m>=0 (2)m<=0 取集合 12/15 16:49
3F：推 colakane:Q3:我自己感觉是C 12/15 16:54
4F：→ kimoqueen:不好意思唷，第一题太不小心了，@@ 第三题我确定是E.. 12/15 16:57
5F：→ kimoqueen:答案有确认过，只是解题无法说明清楚来说服自己... 12/15 16:58
6F：推 colakane:看到你下面的推文了，应该是重叠，也解了我疑惑，谢谢 12/15 17:08