SOLUTION: The first term of an Arithmetic progression is 3, find the common difference if the sum of the first eight terms is twice the sum of the first five terms

Question 972099: The first term of an Arithmetic progression is 3, find the common difference if the sum of the first eight terms is twice the sum of the first five terms
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
and ----this is just an exact transcription of the worded description, using formula for sum of arithmetic sequence.

Answer by MathTherapy(10552) (Show Source): You can put this solution on YOUR website!

The first term of an Arithmetic progression is 3, find the common difference if the sum of the first eight terms is twice the sum of the first five terms

Common difference:
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