Question

Геометрическая прогрессия

Answer 1

$s6 = \frac{b1( {q}^{ 6} - 1)}{q - 1} = \frac{6( {5}^{6} - 1) }{5 - 1} = \frac{6(15625 - 1)}{4} = \frac{6 \times 15624}{4} = 6 \times 3906 = 23436$