Question 974641
Evaluate log 4 base 1/2 
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{{{log(0.5,4)}}}
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You can always use the base change formula:
{{{log(b,a) = log(a)/log(b)}}}
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{{{log(0.5,4) = log(4)/log(1/2)}}}
= -2
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You might recognize that {{{1/2 = 2^-1}}}
and {{{4 = 2^2}}}
--> {{{(2^(-1))^x = 2^2}}}
{{{2^(-x) = 2^2}}}
x = -2