Tuesday, August 13, 2013

Solve : log2(1+x^2) + log2(40) =3

log2(1+x^2) + log2(40) =3 

 log2(40(x^2+1))=3 

 2^log2(40(x^2+1))=2^3 

 40(x^2+1)=8 

 x^2+4/5=0 


x=2sqrt%285%29%2F5+%2Ai%29
or
x=-2sqrt%285%29%2F5+%2Ai 
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