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Valentin [98]
3 years ago
15

What is the 7th term of the geometric sequence where a1 = -4,096 and a4 = 64?

Mathematics
2 answers:
tatyana61 [14]3 years ago
8 0
First, we calculate the common ratio.
an = arⁿ⁻¹
64 = -4096r³
r = -1/4
a(7) = -4096r⁷⁻¹
a(7) = -1
yulyashka [42]3 years ago
5 0

Answer:

answer is -1

Step-by-step explanation:

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<u>Step-by-step explanation:</u>

Use elimination method.  Manipulate one (or both) equations to eliminate one of the variables and solve for the remaining variable.  <em>I will be eliminating y</em>

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Next, replace "x" with "4" into either equation and solve for y.

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<u>Check:</u>

Plug in x = 4 and y = -9 into the other equation to verify it makes a true statement.

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-28  +  18 = -10

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