SOLUTION: If 3, 6, 12, 2y + 6 is a geometric sequence, what is the value of y?

SOLUTION: If 3, 6, 12, 2y + 6 is a geometric sequence, what is the value of y?

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Question 366489: If 3, 6, 12, 2y + 6 is a geometric sequence, what is the value of y?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Look at the differences between terms,

The next difference should be

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