Yes, the given sequence is arithmetic.
To find the common difference, we take the difference between consecutive terms:
0.5 - 0.9 = -0.4
0.1 - 0.5 = -0.4
-0.3 - 0.1 = -0.4
We can see that the common difference is -0.4.
Is the given sequence arithmetic? If so, identify the common difference.
0.9, 0.5, 0.1, −0.3, . . .
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