S1 Mathe question

2009-03-11 2:30 am
1.It is given that the general term of the sequence 7, 2. -3, ........is
An= P-5n

a) Find the value of P
b) Hence, use the result of (a) to find the difference between
the 5th and the 10th term of the sequence.

Please help me to solve it.

回答 (1)

2009-03-11 2:39 am
✔ 最佳答案
a)

p- 5(1) = 7

so, p = 12

b) 5 th term and 10th term

5th term = 12-5(5) = -13

10th term = 12-5(10) = -38

so, -13-(-38) = 25
參考: myself


收錄日期: 2021-04-15 17:21:01
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090310000051KK01171

檢視 Wayback Machine 備份