Mathematics: Find an explicit formula for the geometric sequence -40,-20,-10 Note: the first term should be c(1).c(n)= ?

Find an explicit formula for the geometric sequence

kristynwoodrufp10xsy

18.04.2021

The explicit formula for the geometric sequence is $c(n) = -40\cdot \left(\frac{1}{2} \right)^{n-1}$ .

Step-by-step explanation:

By definition of geometric sequence, we should use the following expression:

$c(n) = c_{1}\cdot r^{n-1}$ , $n \ge 1$ (1)

Where:

$c_{1}$ - First term.

- Geometric rate.

- Position of the element within the series.

If we know that $c_{1} = -40$ and $r = \frac{1}{2}$ , then the explicit formula for the geometric sequence is:

$c(n) = -40\cdot \left(\frac{1}{2} \right)^{n-1}$

The explicit formula for the geometric sequence is $c(n) = -40\cdot \left(\frac{1}{2} \right)^{n-1}$ .

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cherkaouinazihp387bk

27.10.2022

oI know that for a they are pretty much the same shape im not sure how else to desribe it sorry

Step-by-step explanation:

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