The following diagrams(我用數字代表) show the dots in sequence.
1,5,12......................
Find the no. of dots in the 5th term of the sequence.
A.19 B.22
C.29 D.35
唔該比埋個式我!!!!!!
數學ge sequence!!!!!!!!幫幫手呀!!!!!10分!!!!
2007-05-21 2:32 am
回答 (6)
2007-05-21 2:52 am
✔ 最佳答案
T(x) = T(x-1) + [T(x-1) - T(x-2)] + 3T(x) = 2*T(x-1) - T(x-2) + 3
第5個係
T(5) = 2 * T(4) - T(3) + 3
=2*22 - 10 + 3
= 44 - 12 + 3
= 35
答案是D
2007-05-28 3:15 pm
呢個係最近的答案，可惜還沒有完成。
T(n) = [3(n^2) - n]/2。
估唔到冇人識。
T(n) = [3(n^2) - n]/2。
估唔到冇人識。
2007-05-21 3:07 am
你唔俾幅圖計唔到個wor
2007-05-21 2:49 am
T(1) = 1
T(2) = 1+4 = 5
T(3) = 1+4+7 = 12
T(4) = 1+4+7+10 = 22
T(5) = 1+4+7+10+13 = 35
每個數都係加多3, 如7同10相差3, 10同13相差都係3
T(2) = 1+4 = 5
T(3) = 1+4+7 = 12
T(4) = 1+4+7+10 = 22
T(5) = 1+4+7+10+13 = 35
每個數都係加多3, 如7同10相差3, 10同13相差都係3
參考: myself
2007-05-21 2:44 am
5=1+4
12=5+4+3
22=12+7+3
35=22+10+3
式就係佢地之間相差既+3
就係下1個..
佢問你第5個]
就係d.35
12=5+4+3
22=12+7+3
35=22+10+3
式就係佢地之間相差既+3
就係下1個..
佢問你第5個]
就係d.35
2007-05-21 2:34 am
A.19
冇式
冇式
收錄日期: 2021-04-12 19:40:57
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https://hk.answers.yahoo.com/question/index?qid=20070520000051KK04294