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7+7^2+7^3+...+7^2015 UrgENT !!!PLS​

Răspuns :

Răspuns:

7+7²+7³+...+7²⁰¹⁵

2+2015=2017

2017×2018=4070306

2017⁴⁰⁷⁰³⁰⁶