The first term of an arithmetic sequence is a1 = 2, and the third term is a3 = 6. Which of the following could be formula(s) for the sequenc

Question

The first term of an arithmetic sequence is a1 = 2, and the third term is a3 = 6. Which of the following could be formula(s) for the sequence? Select all that apply.

A. an = 2n
B. an = 2n + 2
C. an = n + 2
D. ​​an = an − 1 + 2; a1 = 2

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Trúc Chi 2 months 2021-07-22T13:58:44+00:00 1 Answers 6 views 0

Answers ( )

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    2021-07-22T14:00:33+00:00

    Answer:

    A

    Step-by-step explanation:

    an=2(1)=2

    an=2(3)=6

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )