SOLUTION: For the following arithmetic sequence, find the sum of the terms from a13 to a21 inclusive. 7,10,13,16 The sum of the terms from a13 to a21 inclusive is:

Algebra ->  Sequences-and-series -> SOLUTION: For the following arithmetic sequence, find the sum of the terms from a13 to a21 inclusive. 7,10,13,16 The sum of the terms from a13 to a21 inclusive is:       Log On

The sum of the first n terms



Where a1 = first term = 7
and d = common difference = a2-a1 = 10-7 = 3 = a3-a2 = 
13-10 = 3 = a4-a3 = 16-13 = 3



  



 

 

 

 

 

 

Edwin