Question

radical din 1*6+5*6+5*6^2+5*6^3+...+5*6^2019=36^101x
pls help .Ex 2.

Answer 1

1×6+5(6+6^2+6^3+....+6^2019)=36^101x Pror geometrica q ratia b1 primul element n nr de elemente 1×6+5(6*(6^2019-1)/5)=36^101x 6+6^2020-6=36^101x 6^2020=6^2×101x 6^2020=6^202x Si vine rad(6^2020)=6^1010 Rezulta ca 202x=1010 X=5