Question 55009
Solve and find exact solutions. 
4^(2x-1)=1/2 =2^(-1)
[2^2]^(2x-1)=2^(-1)
2^{2(2x-1)}=2^(-1)
2(2x-1)=-1
4x-2=-1
4x=1
x=1/4

book answer: 1/4