Question

1+6+6 la puterea 2+6 la puterea 3+.....+6 la puterea 2013

Answer 1

a1=1
q=6
an=6^2014
s=$\frac{1-6^{2013}*6}{1-6} = \frac{1-6^{2014}}{-5}$=$\frac{6^{2014}-1}{5}$