Question

D(n)=3(−2)
`^n^-^1`

Answer 1

9514 1404 393

Answer:

d(4) = -24

Explanation:

We assume your formula is intended to be ...

`d(n)=3(-2)^(n-1)`

This describes a geometric sequence with a first term of 3 and a common ratio of -2. That is, each term is -2 times the previous one. Then the first few terms of the sequence are ...

3, -6, 12, -24, 48, -96, ...

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In case you're interested in the 4th term, it is -24.