+0  
 
0
105
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avatar+3413 

Help 6

NotSoSmart  Mar 19, 2018
 #1
avatar+89781 
+2

6. Not arithmetic because the difference between terms is not constant

 

 

7.  12th term  =

 

15  - 4 (12 - 1)  =

 

15 - 4(11)  =

 

15  -  44 =

 

-29

 

8.  To find the missing term

 

[ First term + Third term ]  /  2   =

 

[ 20 + 32 ]  / 2

 

52  / 2  =

 

26

 

 

cool cool cool

CPhill  Mar 19, 2018

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