Question

решите, пожалуйста ​

Answer 1

Ответ:

$lg2( log_{2}( \frac{75 \times 20}{15} ) ) = lg2 (log_{2}(5 \times 20) ) = lg2( log_{2}(100) ) = lg2 \times log_{2}( {10}^{2} ) = lg2 \times 2 log_{2}(10) = 1 \times 2 = 2$