Question

CHECK MY ANSWERS PLEASE

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The sequence is geometric:
3, 13, 23, 33,...

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

True***
False

Answer 1

Explanation:

For a geometric sequence,

`(a_2)/(a_1)=(a_3)/(a_2)`

1. The sequence is :

3, 13, 23, 33,...

`(13)/(3)\\e (23)/(13)`

It is not geometric. It is false

2. The sequence is :

5, -25, 125, -625

`(-25)/(5)=(125)/(-25)\\\\-5=-5`

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