Answer:
this sequence has no common ratio
Explanation:
The ratios of successive terms are ...
4/2 = 2
8/4 = 2
-16/8 = -2
32/-16 = -2
-64/32 = -2
2 is not the same as -2, so this sequence has no common ratio.
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The sequence 2, -4, 8, -16, 32, -64 will have a common ratio of -2 using the same method to find it.