Question 684982
a.
{{{3^x = 1/9}}}
{{{1/9 = 1/3^2 = 3^-2}}}
x = -2
...
b.
{{{2^(3x) = 1/16}}}
{{{1/16 = 1/2^4 = 2^-4}}}
3x = -4
{{{x = -4/3}}}
...
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