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What are the next 2 terms and are they geometric, arithmetics, or neither4,-20,100,-500 _, _,

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In the series it can be observed that every next term is multiplied by -5. So common ratio for the geometric series is -5.

Determine the next term to term -500.


-500\cdot(-5)=2500

Determine the term next to 2500.


2500\cdot(-5)=-12500

Thus next 2 terms for the series is 2500 and -12500.

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