lahnaross19 lahnaross19

08-03-2018
Mathematics

contestada

Decide whether the sequence is arithmetic geometric or neither 5,-10,20, -40

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evgeniylevi evgeniylevi

08-03-2018

Try this option^
note, that all members of this sequence have '-' and '+' and 5*(-2)=-10, -10*(-2)=20; 20*(-2)=-40.
It means, that the suggested sequence is geometric, where b₁=5, q=-2.

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