2 years ago

N

Mathematics

1 answer:

Vaselesa [24]2 years ago

6 0

Answer:

75(1/3)^(n-1).

Step-by-step explanation:

This is a Geometric sequence whose common ratio is 15/75 3/15 = 1/3.

so the nth term an = a1 r^(n-1)

= 75(1/3)^(n-1).

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Black_prince [1.1K]

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2 years ago

Please answer this question

Vladimir [108]

Answer:

a = 3/2
b = -1/2

Step-by-step explanation:

$\dfrac{\sqrt{5}-1}{\sqrt{5}+1}=\dfrac{(\sqrt{5}-1)(\sqrt{5}-1)}{(\sqrt{5}+1)(\sqrt{5}-1)}\\\\=\dfrac{5-2\sqrt{5}+1}{5-1}=\dfrac{6-2\sqrt{5}}{4}\\\\=\dfrac{3}{2}-\dfrac{1}{2}\sqrt{5}$

Comparing this to the form a+b√5, we see that ...

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