given the sequence: 8, 5, 2, 1,... identify if it is arithmetic or geometric? how can you tell?

I do not understand. as my common difference, I got (-3) which is arithmetic but the last number subtracted by -3 does not equal "1", it should equal -1.. Please help
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2 Answers

RONG...its not

not arithmatik kauz delta not konstant

not gometrik, kauz fakter not konstant
by
geometric

the 5 is out of place
by

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