Question

use the formula to evaluate the series 3+6+12+24+48+96

Answer 1

\[\Large \sum_{k=1}^{6}3 \cdot \left( 2 \right)^{k-1}\]

Answer 2

ty

Answer 3

\[\Large =3\times {2^6-1 \over 2-1}\]

Answer 4

thanks