which set of numbers is an example of a harmonic sequence?
A. 1/2, -1/2, 1/2, -1/2
B. 1/2, -1, 2, -4
C. 1/3, 1/9, 1/27, 1/81
D. 2, 2/3, 2/5, 2/7
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which set of numbers is an example of a harmonic sequence?
A. 1/2, -1/2, 1/2, -1/2
B. 1/2, -1, 2, -4
C. 1/3, 1/9, 1/27, 1/81
D. 2, 2/3, 2/5, 2/7
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ANSWER DIts reciprocals are 1/2, 3/2 , 5/2, 7/2 which formed an arithmetic sequence with 1 as its common difference