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13-03-2017
Mathematics

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Julie is selling cookies for a fund raiser she texts 6 of her friends to spread the word, and then asks them to text 6 of their friends and then asks

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18-03-2017

Missing what answer you are looking for in particular.

The sum of texts will be the sum of a geometric sequence:

s(n)=6(1-6^n)/(1-6)

s(n)=-1.2(1-6^n)

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