Question 320879
which of the sequence are arithmetic which are geometric and which are neither 
1,3,5,7,9
d = 2 so arithmetic
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3,6,12,24,48
r = 2 so geometric
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9,13,17,21,25,29
d = 4 so arithmetic
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1,8,27,64,125
neither
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cheers,
Stan H.