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kvasek [131]
2 years ago
6

Write a rule for the geometric sequence with the given description: The first term is −3, and each term is 5 times the previous

term. Then, use the rule to solve for the 9th term. All work must be shown.
Mathematics
1 answer:
ValentinkaMS [17]2 years ago
3 0

Answer: -1171875

Step-by-step explanation:

From the question,

a = first term = -3

r = common ratio = 5

The ninth term will be:

= ar^8

= -3 × 5^8

= -3 × 390625

= -1171875

Therefore, the ninth term is -1171875.

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Answer:

The value of n = 4 and  

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Step-by-step explanation:

Method I:

As given, 12x -20=n (3x-5)      .........(1)

Firstly , take 12x - 20

As 12x - 20 can be written as 4(3x - 5)

∴ equation (1) becomes

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Divide the equation by (3x-5) , we get

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Method II:

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Divide the equation by (4-n) , we get

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