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July 28, 2014

Homework Help: maths

Posted by jen on Friday, October 19, 2007 at 10:39pm.

The common ratio r of a geometric sequence satisfies the quadratic equation 2r squared - 3r -2 = 0. If the sum to infinity of the same sequence is 6, explain why, in this case, r can only take on one value, and hence state the common ratio, r. Also, show that the first term 'a' of this sequence is 9.

Thanks so much xx

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