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Sagot :
all you have to do is multiply it by two. And i think it's an alternate positive, negative pattern.
So:
5,-10,20,-40,80
So:
5,-10,20,-40,80
Since it is a geometric sequence you multiply to get the next term
-10 divided by 5 is -2 as well as -20 divided by 10
so the next two terms are -40 and 80
-10 divided by 5 is -2 as well as -20 divided by 10
so the next two terms are -40 and 80
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