2^(x-1) = 2^x / 2
deci 2^x / 2 = 1/√x
fie √x = u
2^(u²) / 2 = 1 / u
se inmulteste totul cu 2u
2^(u²) * u = 2
se logaritmeaza in baza 2
log2(2^(u²) * u) = log2(2)
log2(2^(u²)) + log2(u) = 1
u^2 + log2(u) = 1
solutie u = 1.
dar u = √x deci x = 1² = 1.
x = 1
