Question 976904
{{{ln(4/(a)^(1/2))}}}

now 

{{{ln(a/b)=ln(a)-ln(b)}}}

so


{{{ln(4)-ln(a)^(1/2))}}}

and

{{{ln(a)^(b) = b(ln(a))}}}

so

{{{ln(4)-(1/2)(ln(a)))}}}

{{{2(ln(2))-(1/2)(ln(a)))}}}

{{{(2*.693)-(1/2)(2.886)}}}

{{{-.0567}}}