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nevsk [136]
3 years ago
5

The formula for any geometric sequence is an = a1 · rn - 1 , where a n represents the value of the n th term, a1 represents the

value of the first term, r represents the common ratio, and n represents the term number. What is the formula for the sequence -3, -6, -12, -24, ...?
Mathematics
1 answer:
const2013 [10]3 years ago
3 0

Answer:

  an = -3·2^(n-1)

Step-by-step explanation:

The first term is a1 = -3.

The common ratio is r = -6/-3 = 2.

The given formula tells you the formula for this sequence is ...

  an = -3·2^(n-1)

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IceJOKER [234]
We have that
<span>(a/6)-10=(a/3)
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3*(a-60)=6*a
(a-60)=(6/3)*a
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the answer is
(a-60)=2*a


<span>alternative method shorter
</span>(a/6)-10=(a/3)
multiply all expression by 6
6*(a/6)-6*10=6*(a/3)
a-60=(6/3)*a
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