(\frac{1}{4})^{4x-1}=8
źródło:
[(\frac{1}{2})^2]^{4x-1}=8
2^{2(4x-1)}=2^3
2(4x-1)=3
8x-2=3
8x=3+2
8x=5/:8
x=\frac{5}{8}