Find the missing term of the following sequence. . . –45, –12, . . –28.5 –21 –19.5 –33

The series is as follows:



So, we will analyze each term:

1. If then:

 
 

2. If then:

 
 

3. If then:

 
 

3. If then:

 
 

Finally, the sequence occurs when 
 This is the missing term

C, e, and a (hope it )