Question

Найдите значение выражения

Answer 1

$- 2 log_{7}( {7}^{7} ) + 7 log_{2}( {2}^{5} ) = - log_{7}( {7}^{14} ) + log_{2}( {2}^{35} ) = - 14 + 35 = 21$

Answer 2

- 2·log₇ (7⁷) + 7·log₂ (2⁵) =

= - 2 · 7·log₇ 7 + 7 · 5·log₂ 2 =

= - 14· log₇ 7 + 35·log₂ 2 =

= - 14 · 1 + 35 · 1 = - 14 + 35 = 21