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标题: 大全-Math-DS-section 17-20 [打印本页]

作者: WalkByFaith    时间: 2005-7-13 08:13
标题: 大全-Math-DS-section 17-20

大全-Math-DS-section 17-20


20. Is less than 1,000 ?


(1) 5^(k-1) >3000



(2)  5^(k-1) >5^k - 500


ans: B.



I thought it should be D because 1) gives us : 5^k >3000*5, thus 5^(k-1) >15000



NN, please help, thanks.


作者: WalkByFaith    时间: 2005-7-13 08:15

i am sorry, should be:


大全-Math-DS-section 17-20


20. Is 5^k ATH connecttype="rect" gradientshapeok="t" extrusionok="f">ATH>less than 1,000 ?


(1) 5^(k-1) >3000



(2)  5^(k-1) >5^k - 500


ans: B.



I thought it should be D because 1) gives us : 5^k >3000*5, thus 5^k >15000



NN, please help, thanks.


作者: WalkByFaith    时间: 2005-7-13 13:17
自己顶一下, 求NN帮忙啊!
作者: WalkByFaith    时间: 2005-7-13 23:42
up again by myself.
作者: happyfish0517    时间: 2005-7-13 23:59
以下是引用whq2002在2005-7-13 8:13:00的发言:

大全-Math-DS-section 17-20


20. Is less than 1,000 ?


(1) 5^(k-1) >3000



(2)  5^(k-1) >5^k - 500


ans: B.



I thought it should be D because 1) gives us : 5^k >3000*5, thus 5^(k-1) >15000



NN, please help, thanks.


不好意思啊~~题目highlight处好像不全啊...什么<1000呢?


作者: WalkByFaith    时间: 2005-7-14 06:57

THAT SHOULD BE 5^k WHICH WAS CORRECTED IN SECOND FLOOR.


happyfish0517, PLEASE HELP, THANK YOU VERY MUCH.


作者: WalkByFaith    时间: 2005-7-14 13:31
up by myself again, sorry, NN, any suggestions and comments? thanks.
作者: WalkByFaith    时间: 2005-7-15 01:39

UP AGAIN:


大全-Math-DS-section 17-20


20. Is 5^k ATH gradientshapeok="t" extrusionok="f" connecttype="rect">ATH>less than 1,000 ?


(1) 5^(k-1) >3000



(2)  5^(k-1) >5^k - 500



ans: B.








I thought it should be D because 1) gives us : 5^k >3000*5, thus 5^k >15000







NN, CORRECT ME, thanks.


作者: happyfish0517    时间: 2005-7-15 01:48

SORRY啊,才来~~


如果正如LZ所述,这题是应该选D...


如果1)中是5^(K-1)<3000,那就是B...


汗!


[此贴子已经被作者于2005-7-15 1:54:04编辑过]

作者: happyfish0517    时间: 2005-7-15 01:58

另外...我弱弱的问一下楼主~~~数学大全是什么?


是CD上下载的吗?为什么我没找到过??


谢谢!~


作者: WalkByFaith    时间: 2005-7-15 08:28

thanks for your confirmation, happyfish0517.


what i mean 数学大全 is the paper test accumulation or old XDF 4 volumes.


thanks again.






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