Question 690876: Find the sum of the first 196 terms of 2,7,12,17,...
Answer by mouk(232)   (Show Source):
You can put this solution on YOUR website! The terms 2,7,12,17,... form an Arithmetic Progression (AP) with:
first term, a = 2
common difference, d=5
You can use the AP summation formula 
The result is as follows:
| Solved by pluggable solver: Arithmetic Progression (AP) Solver |
The first few terms of this AP are:
a=2, a+d=7, a+2d=12, a+3d=17, ...
or, just: 2, 7, 12, 17, ...
The Sum of the first n terms is given by:
So substituting a=2, d=5 and n=196 gives:
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