+0  
 
0
140
1
avatar

If the second term of an arithmetic sequence is -2 and the fourth term is 6, find the seventh term

Guest Jun 22, 2017
Sort: 

1+0 Answers

 #1
avatar+79894 
+1

 

 

We can find the common difference, d, between terms thusly :

 

d  =   [ 4th term - 2nd term ] / [4 - 2]  =  [ 6 - -2] / 2   = [8] / 2  = 4

 

So....the 7th term is given by

 

6 + 3d  = 

 

6 +  3(4)  =

 

6 + 12  =

 

18

 

 

cool cool cool

CPhill  Jun 22, 2017

6 Online Users

We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details