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mamaluj [8]
2 years ago
9

If you get the answers right you will get brainliest and get a thanks :-)

Mathematics
1 answer:
sergejj [24]2 years ago
5 0
5.   3, 12, 48, 192, 768, ...

You can find the 15th term by using the formula a_n = a_1 *r^{n-1}, where a_1 is the first term of the sequence, r is the common ratio, and n is the number of the term you want to find.

<span>a_n = a_1 *r^{n-1}   Plug in your information (the common ration is x4)
</span>a_{15} = 3 * 4^{14}   Simplify the exponent
a_{15} = 3 * 268435456   Multiply
a_{15} = 805306368

The 15th term of the sequence is <span>805306368.

6.   200, 40, 8, 1.6, ...
Using guess and check, I found that the pattern here is </span>÷5, ÷5, ÷5, .... That can also be written as ×\frac{1}{5}, ×\frac{1}{5}, <span>×\frac{1}{5}, ... When you are multiplying the terms of a sequence, that is a geometric sequence.
</span>
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