SOLUTION: A sequence has 12 elements. The six elements form a geometric progression and the last seven elements form an arithmetic progression. If the first element is 3 and the sixth elemen

Question 1023563: A sequence has 12 elements. The six elements form a geometric progression and the last seven elements form an arithmetic progression. If the first element is 3 and the sixth element is -96,find the sum of the first six terms and the 10th element if the 12th element is -72.
Answer by ikleyn(52786) (Show Source): You can put this solution on YOUR website!
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A sequence has 12 elements. The six elements form a geometric progression and the last seven elements form an arithmetic progression. If the first element is 3 and the sixth element is -96,find the sum of the first six terms and the 10th element if the 12th element is -72.
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The condition does not say that the FIRST six elements form a geometric progression.

The rest would be obvious.

Bad formulation.

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