The nth term of a sequence is 14+3n. Which of the following correctly describe the sequence?
A. It is an arithmetic sequence with first term 17 and common difference 14.
B. It is an arithmetic sequence with first 17 and common difference 3.
C. It is an arithmetic sequence wth first term 14 and common difference 3.
D. It is a geometric sequence with first term 14 and common ratio 3.
F.3-4_____Maths (MC)
2007-08-25 12:30 am
回答 (1)
2007-08-25 12:42 am
✔ 最佳答案
The answer isC. It is an arithmetic sequence wth first term 14 and common difference 3.
Sub. n=0,
14+3n=14 <== first term
Sub. n=1
14+3n=17 <== Second term
Sub. n=2
14+3n=20 <== Third term
Second term - first term = 17-14 = 3
Third term - Second term = 20-17 = 3
Therefore, the first term is 14 and the common difference is 3.
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