Question

Classify the sequence arithmetic , geometric, or neither

Answer 1

B so geometric :)

Answer 2

Geometric

Explanation:

Given terms are {3, -1, 1/3, -1/9............}

If we have common difference between the terms then it is arithmetic

If we have common ratio between the terms then it is Geometric

Difference of 3 and -1 is 4

Difference of 1/3 and -1 is -4/3

Common difference it not same so it is not Arithmetic

Now we check common ratio

we divide second term by first term

first term is 3 and second term is -1

`(-1)/(3)`

now we check with next two terms

`((1)/(3))/(-1)=(-1)/(3)`

common ratio is -1/3

So this is Geometric