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# sequences question

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1. The question is, the sequence is defined by U1 = 8 u n+1 = au to n + 1 where A is negative,
U3 = 2.68

The question is how do i find A.

I am guessing i have to construct a simultanetus equation to find U2? but I;m not sure where to start
2. (Original post by SunDun111)
The question is, the sequence is defined by U1 = 8 u n+1 = au to n + 1 where A is negative,
U3 = 2.68

The question is how do i find A.

I am guessing i have to construct a simultanetus equation to find U2? but I;m not sure where to start
U1 = 8 u n+1 = au to n + 1

Please make this clearer or post a picture of the question.

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