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algebra

posted by on .

I need help!!!
3/2,1/2, 1/6,1/8,...
I need to determine if this sequence is arithmetic, geometric, or neither, then I need to find the ninth term

  • algebra - ,

    is (1/2) - (3/2) = (1/6)-(1/2)
    if yes, then arithmetic, but it isn't.

    is (1/2) ÷ (3/2) = (1/6)÷(1/2)
    if yes, then geometric
    1/2 ÷ 3/2 = 1/3
    (1/6)÷(1/2) = 1/3
    but
    (1/8) ÷ (1/6) = .75 (no good)

    so the sequence is neither arithmetic nor geometric.

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