Question

Решение уравнений 27^(1-x)=1/81

Answer 1

3^3*(1-х)=3^(-4)
3*(1-х)= -4
3-3х= -4
3х = 7
х = 7/3 = 2 1/3

Answer 2

$27 ^{1-x} = frac{1}{81} \ (3^{3} ) ^{1-x}=3 ^{-4} \ 3 ^{3-3x}=3 ^{-4} \ 3-3x=-4 \ 3+4=3x \ 3x=7 \ x= frac{7}{3 } \ OTBET: frac{7}{3}$