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Georgia [21]
3 years ago
12

Find the common ratior r for the geometric sequence and use r to find

Mathematics
2 answers:
kari74 [83]3 years ago
8 0
It happens to be 7 i think
Pani-rosa [81]3 years ago
8 0

Answer:

r = -3

Step-by-step explanation:

to find r divide the 2nd term by the first:

9/ -3 = -3

to check if this is the same ratio for each number divide it by the ratio to get the number before it:

-27/ -3 = 9

81/ -3 = 27

to find the next three terms multiply the last number by the ratio then repeat

(81)(-3) = -243

(-243)(-3) = 729

(729)(-3) = -2187

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