SOLUTION: Are these sequences arithmetic, geometric, or neither? (1) 3, 5, 8, ... (2) 2a, 4a^2, 8a^3, ... I think the first is neither and the second is geometric but need guidance,

Question 1188227: Are these sequences arithmetic, geometric, or neither?
(1) 3, 5, 8, ...
(2) 2a, 4a^2, 8a^3, ...
I think the first is neither and the second is geometric but need guidance, thank you so much!
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

the following sequence:
(1) , , , ...

This sequence is not arithmetic ( common difference ), and it's not geometric ( no common ratio ) .
answer:

(2) , , , ...
not arithmetic (no common difference )

let's check common ratio:

The between the consecutive terms is so we can conclude that the sequence is .

RELATED QUESTIONS
The first term of a sequence are 1, -5/2, 2, and -3/2. determine whether the sequence is... (answered by stanbon)

What is the sequence patten and identify the sequences as arithmetic, geometric , or... (answered by vleith,jim_thompson5910)

1) What is the next term in this geometric sequence? 104, -52, 26, -13, ... 2)If the... (answered by ikleyn,greenestamps)

Indicate whether each of the following sequences, (A) is geometric, arithmetic, or... (answered by Boreal)

Determine whether the sequence is arithmetic, geometric, or neither. 1,-3,9,-27,81...... (answered by Mini-)

i really need help with this! i already got on tutor.com and didnt understand how they... (answered by ewatrrr)

1/12, 2/13, 3/14, 4/15... is this sequence geometric, arithmetic, or... (answered by psbhowmick)

is this sequence arithmetic, geometric or neither? t subscript n=3/2... (answered by stanbon)

Here is the problem: (4a^2b^3)^-2 (2ab^-1)^3/(a^3b)^-4 The steps I use are:... (answered by josgarithmetic)