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GREYUIT [131]
2 years ago
9

Complete the recursive formula of the geometric sequence -0.6, 3, -15, 75, ...

Mathematics
2 answers:
lara [203]2 years ago
7 0

Answer:

\boxed{Un = 3(-5)^{n - 2}}

Step-by-step explanation:

We know that

a = -0,6 = -\frac{3}{5} and r = \frac{3}{-0,6} = -5

.

So

Un = ar^{n - 1}

Un = (-\frac{3}{5} )(-5)^{n - 1}

Un = (3)(-5)^{-1}(-5)^{n - 1}

Un = 3(-5)^{n - 2}

KatRina [158]2 years ago
6 0

Answer:

use this form 》Un = ar^(n - 1)

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