Whic of the two sequence is arithmetic?81,64,47,30,13 and 3,12,48,192,768?
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Answer:
a2-a1=64-81=-17
a3-a2=47-64=-17
a4-a3=30-47=-17
a5-a4=13-30=-17
a6-a5=-4-13=-17
The difference between every two adjacent members of the series is constant and equal to -17
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