Question

СРОЧНО! ПОМОГИТЕ ПОЖАЛУЙСТА

Answer 1

$81 {}^{1 - log_{9}(5) } = 81 \times 81 {}^{ - log_{9}(5) } = 81 \times (9 {}^{2} ) {}^{ - log_{9}(5) } = 81 \times 9 {}^{ - 2 log_{9}(5) } = 81 \times 9 {}^{ log_{9}(5 {}^{ - 2} ) } = 81 \times 5 {}^{ - 2} = \frac{81}{25} = 3 \frac{6}{25} = 3.24$