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3 years ago

5

Find the first fourth and eighth terms of the sequence a(n)=-2*5^n-1

1 answer:

agasfer [191]3 years ago

6 0

A(1)=2*5^1-1=2*5^0=2*1=2
a(4)=2*5^4-1=2*5^3=2*125=250
a(8)=2*5^8-1=2*5^7=2*78,125=156,250

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