# Sequencce (Xn) please?

##### 1 Answer

Jun 1, 2018

#### Answer:

See process below

#### Explanation:

Take a look to the first four terms

First: we note that terms are alternate positive and negative, so the ratio is a negative number. Lets see

Then the comon ratio is

a) The recurrence system is

By other hand, we know that a geometric sequence has the general term given by

Then

c)

d) However the common ratio is bigger than 1, when n increase his value, the terms grow indefinitely alternating sign (the even terms are negatives and odd positives)