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yKpoI14uk [10]
3 years ago
13

What is undefined I need help I don't understand this question

Mathematics
1 answer:
timurjin [86]3 years ago
4 0
(4/9-9) and (4/0) are undefined as you can not divide by the value of 0.
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In a geometric sequence, a2=2, a3=16, and a4=128.
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Answer:

an = 1/4(8)^n-1

Step-by-step explanation:

Given the following in a geometric sequence, a2=2, a3=16, and a4=128.

nth term of a sequence = ar^n-1

a is the first term

r is the common ratio

r = a3/a2 = a4/a3

r = 16/2 = 128/16

r = 8

a2 = ar

2 = 8a

a = 2/8

a = 1/4

The nth term by substituting the parameters will be;

an = 1/4(8)^n-1

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Hope this helps you.

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