2 years ago

Evaluate the arithmetic series described:

Mathematics

1 answer:

Art [367]2 years ago

8 0

Answer:

Step-by-step explanation:

a 1296

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Given the geometric sequence where a1 = 3 and r = √2 find a9

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Answer:

$a_9=48$

Step-by-step explanation:

we are given

sequence is geometric

so, we can use nth term formula

$a_n=a_1(r)^{n-1}$

we have

$a_1=3$

$r=\sqrt{2}$

we have to find a9

so, we can plug n=9

we get

$a_9=3(\sqrt{2})^{9-1}$

$a_9=2^4\cdot \:3$

$a_9=48$

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