Question

Which describes the type of sequence...pt.1​

Answer 1

Answer:

Choice B is correct.

Step-by-step explanation:

We have given a sequence:

99,89.9,78.8,68.7,............

We have to describe the type of sequence.

First,to check is it a arithmetic:

89.9 - 99 = -9.1

78.8 - 89.9 = -11.1

The common difference is not same so, this cannot be arithmetic sequence.

To check is it a geometric or not.

89.9/99 = 899/990

78.8/89.9=788/8990

The common ratio  is not same so, it is not geometric.

Choice B is correct.

Answer 2

Answer:

neither arithmetic nor geometric

Step-by-step explanation:

The given sequence is

$99,89.9,78.8,68.7,...$

$89.9-99=-9.1$

$78.8-89.9=-11.1$

The differences are not the same so this cannot be an arithmetic sequence.

$\frac{89.9}{99}=\frac{899}{990}$

$\frac{78.8}{89.9}=\frac{788}{899}$

The ratios are not the same so it can also not be geometric.

The sequence is neither arithmetic nor geometric.