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22nathanieltimms
21.06.2019 •
Mathematics
What is the nth term rule of the linear sequence below? 27 , 25 , 23 , 21 , 19 , . .
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Ответ:
The required n-th term is 25+2n.
Step-by-step explanation: We are given to find the n-th term of the following linear sequence :
27, 25, 23, 21, 19, . . .
We note from the given sequence that
So, the given sequence is an arithmetic sequence with first term 27 and common difference, 2.
We know that the n-th term of an arithmetic sequence with first term a and common difference d is given by
For the given sequence, we have
a = 27 and d = 2.
Therefore, the n-th term of the given sequence is
Thus, the required n-th term is 25+2n.
Ответ:
B and D
Step-by-step explanation: