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#1 2007-04-12 00:45:39
- ihatemathmost
- Member
- Registered: 2007-04-12
- Posts: 1
geometric progression help
the first 3 terms , all positive , of a certain gp are x-4, x ,5x-12
find the value of x and the 4th term.
how do i find the value of x??? do i use the geometric mean ?
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#2 2007-04-12 01:08:01
- ihatemathmost
- Member
- Registered: 2007-04-12
- Posts: 1
Re: geometric progression help
lol i solved it. i cant belive i am so retarded, i looked at the wrong answer
Last edited by ihatemathmost (2007-04-12 01:08:20)
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#3 2007-04-12 01:42:57
- JaneFairfax
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- Registered: 2007-02-23
- Posts: 6,868
Re: geometric progression help
x = 6; the fourth term is 54, right? 
If you find your answer is not the same as what you are looking at, simply go back to the question and double check with your own answer. If you find that all your working is correct, then its what youre looking at that is wrong, not your own answer. 
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