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It looks as if each number is equal to the previous number, multiplied by -1/2. Therefore, one way to write the formula for the n'th term is:-24 x (-1/2)^n

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โˆ™ 7y ago
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โˆ™ 7y ago

It is Un = -24*(-1/2)^n for n = 1, 2, 3, ...

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Q: What is the explicit formula for 12 -6 3 ...?
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