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Which expression represents the series 1+5+25+125+625?
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Which expression represents the series 1+5+25+125+625?

User Roger Chan
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Hello,

s=1+5+25+125+625 is the sum of the 5 terms of the geometric serie 1,5,25... 1 is the first term and 5 the ratio.



s=(5^(5) -1)/(5-1)=(3124)/(4)=781


User Hasibur Rahman
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