Question

показательные уравнения:
$5^{x-2} =25$
$(\frac{1}{7} )^{x} =49$

Answer 1

Ответ:

${5}^{x - 2} = 25 \\ {5}^{x - 2} = {5}^{2} \\ x - 2 = 2 \\ x = 4$

.....

$({\frac{1}{7}})^{x} = 49 \\ {7}^{ - x} = {7}^{2} \\ - x = 2 \\ x = - 2$