Question 41575
a)2^3x-1=1/128 
{{{2^(3x) - 1 = 1/128}}}
{{{2^(3x) = 129/128}}}
{{{log(2^(3x)) = log(129/128)}}}
{{{3x*log(2) = log(129/128)}}}
{{{x = log(129/128)/(3*log(2))}}}
{{{x = 0.003742418}}}
b) ln(4x-3)=1
{{{ln(4x - 3) = 1}}}
{{{log(e,4x - 3) = 1}}}
{{{4x - 3 = e^1}}}
{{{x = e/4 + 3/4}}}
{{{x = 1.429570457}}}