SOLUTION: whats the sum of the first 50 terms 204+198+192+186

Question 1100401: whats the sum of the first 50 terms 204+198+192+186
Found 2 solutions by Fombitz, ikleyn:
Answer by Fombitz(32388)   (Show Source): You can put this solution on YOUR website!
The difference between terms is .

.
.

.
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The sum of a arithmetic progression is,

So,

Answer by ikleyn(52788)   (Show Source): You can put this solution on YOUR website!
.
There is a bunch of introductory lessons on arithmetic progressions in this site:
    - Arithmetic progressions
    - The proofs of the formulas for arithmetic progressions
    - Problems on arithmetic progressions
    - Word problems on arithmetic progressions

They are written SPECIALLY for you . . .

Why do not you read it ??

You will be able, like a magician, sum up any arithmetic progression . . .

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