CHECK MY ANSWERS PLEASE ____ The sequence is geometric: 3, 13, 23, 33,… True False*** __________

Question

CHECK MY ANSWERS PLEASE
____
The sequence is geometric:
3, 13, 23, 33,…

True
False***
_____________________
The sequence is geometric:
5, -25, 125, -625,…

True***
False

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Gia Bảo 3 years 2021-08-04T20:11:56+00:00 1 Answers 11 views 0

Answers ( )

    0
    2021-08-04T20:13:14+00:00

    Answer:

    1. False 2. True

    Step-by-step explanation:

    For a geometric sequence,

    \dfrac{a_2}{a_1}=\dfrac{a_3}{a_2}

    1. The sequence is :

    3, 13, 23, 33,…

    \dfrac{13}{3}\ne \dfrac{23}{13}

    It is not geometric. It is false

    2. The sequence is :

    5, -25, 125, -625

    \dfrac{-25}{5}=\dfrac{125}{-25}\\\\-5=-5

    So, the sequence is geometric as the common ratio is same. It is true.

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