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Penggal 1 - Mathematics (T) 讨论区
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发表于 9-8-2014 11:46 PM
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doeramon 发表于 7-8-2014 04:43 PM 
2-4怎样做，1的我会了
where did u get this ans?
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发表于 13-8-2014 08:40 PM
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weston123453 发表于 9-8-2014 11:46 PM
where did u get this ans?
pelangi的问题来的
书后面的答案
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发表于 16-8-2014 12:49 AM
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请问这几题怎样做？第二课的
AP
1) In an AP, the sum of the first 2n terms is equal to the sum of the following n terms. If the a=12, d=3, find the value of n.
2) Show that the sum of odd integers from 1 till (2n-1) is n^2. Find the smallest value of n such that the sum of n terms exceeds 4000.
GP
1) Find the sum to the n^th term of thr G.series 108+60+33 1/3+.... If s is the smallest number which exceeds this sum for all values of n, find the value of s. Find also the smallest value of n such that the sum of the series exceeds 99% of the value of s.
2) Write down the first four terms of a geometric series with sum 4/3 and a=1. Find the value of r such that the series:
r^2 + r^2/(1+r^2) + r^2/(1+r^2)^2 +...
is convergent, and also the non zero value of the sum.
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发表于 16-8-2014 03:21 PM
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请问以下3题怎么做？是不是直接把号码带进去就可以了？
比如d的,90/1+90/2+90/3+...90/5然后加起来就可以了？？还是有步骤的？ |
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发表于 18-8-2014 09:34 PM
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[img]%5Bimg%5D [/img][/img]
谁来解解？？第四课的... |
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发表于 18-8-2014 09:36 PM
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我做到这里了... 谁来帮忙接下去....gif) |
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发表于 12-9-2014 08:41 PM
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发表于 24-10-2014 10:25 PM
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ChongKahMeng 发表于 24-2-2014 07:34 PM
Who nid STPM pass year question (1999-2011) , powerpoint and notes according to terms ( new modular ...
may i ask ur math t past year paper got the solution or not? |
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发表于 10-11-2014 01:06 PM
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发表于 10-11-2014 01:15 PM
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find the vector equation of the plane thru PQ which perpendicular to L
类似这种问题怎么做啊@@:dizzy: |
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发表于 21-5-2015 05:53 PM
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show 1－2+3-4+……+(2n－1)-(2n)=-n(2n+1) |
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发表于 21-5-2015 05:54 PM
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发表于 1-6-2015 06:34 PM
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请各位大神救救我 7 b 8 a b d怎样做 做log快疯了 可以show procedure给我吗 |
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发表于 1-6-2015 06:38 PM
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发表于 1-6-2015 07:05 PM
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what is the answer for 8a , i got 3/4 |
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发表于 1-6-2015 07:10 PM
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发表于 1-6-2015 07:32 PM
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本帖最后由 tat94 于 1-6-2015 07:40 PM 编辑
i got ans for 8b
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发表于 1-6-2015 07:48 PM
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本帖最后由 tat94 于 1-6-2015 08:06 PM 编辑
i got ans for 8d
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发表于 1-6-2015 08:07 PM
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发表于 1-6-2015 08:16 PM
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