SOLUTION: I need to know how to find the value of x for the following geometric sequence- 10, 2x, 3x...

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Question 1021081: I need to know how to find the value of x for the following geometric sequence- 10, 2x, 3x...
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
If the first three terms are in geometric sequence, then %282x%29%2F10+=+%283x%29%2F%282x%29
==> x%2F5+=+3%2F2 ==> x = 15/2, or 7.5.