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Mathematics 9 Online
OpenStudy (anonymous):

describe the pattern 16,-8,4,-2,1...

OpenStudy (anonymous):

It seems like the pattern is dividing by two, and changing the sign, as you probably noticed. In a more mathematical language, one may say it is generated by : \[ u_0 = 16 \;\; \mathrm{and} \;\; u_{n+1} = - \frac{ U_n }{2} \]

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