呢兩條問題點做？(最佳解答)?
回答 (3)
2015-08-28 3:00 pm
22.
The sum of T(4) and T(6)
= [(4 + 8)/(4 + 4)] + [(6 + 8)/(6 + 4)]
= (12/8) + (14/10)
= (3/2) + (7/5)
= (15/10) + (14/10)
= 19/10
23.
T(n) : Number of dots in the nth figure.
T(1) = 3 = 2×1 + 1
T(2) = 5 = 2×2 + 1
T(3) = 7 = 2×3 + 1
T(4) = 9 = 2×4 + 1
Hence, T(n) = 2n + 1
Number of dots in the nth figure = 2n + 1
The sum of T(4) and T(6)
= [(4 + 8)/(4 + 4)] + [(6 + 8)/(6 + 4)]
= (12/8) + (14/10)
= (3/2) + (7/5)
= (15/10) + (14/10)
= 19/10
23.
T(n) : Number of dots in the nth figure.
T(1) = 3 = 2×1 + 1
T(2) = 5 = 2×2 + 1
T(3) = 7 = 2×3 + 1
T(4) = 9 = 2×4 + 1
Hence, T(n) = 2n + 1
Number of dots in the nth figure = 2n + 1
2015-08-28 2:24 pm
2015-08-28 2:28 pm
收錄日期: 2021-04-18 00:06:39
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150828062417AAVj5Ns