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发表于 7-9-2009 01:35 AM
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回复 1# Dicardo 的帖子
actually these events r NOT INDEPENDENT EVENTS , isn it?i am lower 6, i am now learning this chapter probability almost 2 finish |
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发表于 7-9-2009 08:55 AM
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原帖由 Log 于 2009/9/7 01:29 AM 发表 
3P2/6=I not equal to 3???
Quoted from my solution
'Hence we get 3P2/6 = 3P2/3! = [ 3!/(3-2)!] / 3! = 3' |
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发表于 7-9-2009 02:24 PM
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发表于 7-9-2009 06:17 PM
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回复 22# darksider 的帖子
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sorry i still do not understand why 3P2/6 will get 3?Isn it will get 1?请多多指教。 |
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发表于 7-9-2009 07:37 PM
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原帖由 Log 于 2009/9/7 06:17 PM 发表 
sorry i still do not understand why 3P2/6 will get 3?Isn it will get 1?请多多指教。
sry, calculation error, should be 1. |
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发表于 8-9-2009 04:41 PM
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in chapter polynomial,i saw this sentence: the coefficient of x^3 is unity，find.....
what does it mean? coeff. of x^3 is unity?是不是说coeff.x^3等于1？ |
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发表于 8-9-2009 07:46 PM
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原帖由 Log 于 2009/9/8 04:41 PM 发表 
in chapter polynomial,i saw this sentence: the coefficient of x^3 is unity，find.....
what does it mean? coeff. of x^3 is unity?是不是说coeff.x^3等于1？
yes... in mathematics, unity is the number one. |
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发表于 8-9-2009 10:16 PM
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回复 27# darksider 的帖子
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thanks again |
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